Climate of Buenos Aires: Difference between revisions
Rescuing 1 sources and tagging 0 as dead. #IABot (v1.5beta) |
|||
| Line 12: | Line 12: | ||
The climate of Buenos Aires is dominated by the semi–permanent [[South Atlantic High]] throughout the year.<ref name=amba/> This brings in moist winds from the northeast, which brings most of the precipitation to the city.<ref name=amba/> During winter, it brings in [[frontal system]]s responsible for precipitation in the city.<ref name=amba/> In autumn and summer, it produces storms that are generally located north of the city and produces strong winds from the south or southeast that can occasionally lead to the swelling of the [[Río de la Plata]], flooding coastal areas.<ref name=amba/> The [[South Pacific High]] is the origin of polar [[air mass]]es that are responsible for the coldest temperatures and result in clear and very dry conditions.<ref name = Bejaran2003/> These air masses originate from the South Pacific high and move in a northeastern direction during winter towards Buenos Aires by passing.<ref name=Bejaran2003/> Although it is polar maritime (this is a cool, moist air mass that forms from oceans located in the subarctic and arctic regions at the southern tip of [[South America]]), it becomes modified as it passes over the South American continent, becoming drier as it arrives at Buenos Aires.<ref name=Bejaran2003/>{{sfn|Blouet|2010|p=33}} This is because as the cold air masses from the South Pacific High move over the Pacific Ocean and the Andes and reach the land south of 35<sup>o</sup>S (where the Andes are shorter in height), [[anticyclogenesis]] leads to the formation of a strong high pressure system in the center of the country (at around 40<sup>o</sup>S).<ref name=Bejaran2003/><ref name = Vera2002>{{cite journal |last1=Vera |first1=Carolina |last2=Vigliarolo |first2=Paula |last3=Berbery |first3=Ernesto |year=2002 |title=Cold Season Synoptic-Scale Waves over Subtropical South America |url=http://journals.ametsoc.org/doi/abs/10.1175/1520-0493(2002)130%3C0684:CSSSWO%3E2.0.CO%3B2 |journal=Monthly Weather Review |publisher=American Meteorological Society |volume=130 |issue=3 |pages=684–699 |doi=10.1175/1520-0493(2002)130<0684:CSSSWO>2.0.CO;2 |access-date=12 March 2016|bibcode = 2002MWRv..130..684V }}</ref> This high pressure system brings cold and dry, polar continental air masses to Buenos Aires.<ref name=Bejaran2003/><ref name=Vera2002/> Cold fronts are more common during winter than in summer as the South Atlantic and South Pacific highs are at their southernmost positions during summer, making it difficult for cold fronts to enter.<ref name = Seluchi2000>{{cite journal |last1=Seluchi |first1=Marcelo |last2=Marengo |first2=José |year=2000 |title=Tropical-Midlatitude Exchange of Air Masses During Summer and Winter in South America: Climatic Aspects and Examples of Intense Events |url=http://onlinelibrary.wiley.com/doi/10.1002/1097-0088(200008)20:10%3C1167::AID-JOC526%3E3.0.CO;2-T/pdf |journal=International Journal of Climatology |publisher=Royal Meteorological Society |volume=20 |issue=10 |pages=1167–1190 |doi=10.1002/1097-0088(200008)20:10<1167::AID-JOC526>3.0.CO;2-T |access-date=13 March 2016}}</ref> |
The climate of Buenos Aires is dominated by the semi–permanent [[South Atlantic High]] throughout the year.<ref name=amba/> This brings in moist winds from the northeast, which brings most of the precipitation to the city.<ref name=amba/> During winter, it brings in [[frontal system]]s responsible for precipitation in the city.<ref name=amba/> In autumn and summer, it produces storms that are generally located north of the city and produces strong winds from the south or southeast that can occasionally lead to the swelling of the [[Río de la Plata]], flooding coastal areas.<ref name=amba/> The [[South Pacific High]] is the origin of polar [[air mass]]es that are responsible for the coldest temperatures and result in clear and very dry conditions.<ref name = Bejaran2003/> These air masses originate from the South Pacific high and move in a northeastern direction during winter towards Buenos Aires by passing.<ref name=Bejaran2003/> Although it is polar maritime (this is a cool, moist air mass that forms from oceans located in the subarctic and arctic regions at the southern tip of [[South America]]), it becomes modified as it passes over the South American continent, becoming drier as it arrives at Buenos Aires.<ref name=Bejaran2003/>{{sfn|Blouet|2010|p=33}} This is because as the cold air masses from the South Pacific High move over the Pacific Ocean and the Andes and reach the land south of 35<sup>o</sup>S (where the Andes are shorter in height), [[anticyclogenesis]] leads to the formation of a strong high pressure system in the center of the country (at around 40<sup>o</sup>S).<ref name=Bejaran2003/><ref name = Vera2002>{{cite journal |last1=Vera |first1=Carolina |last2=Vigliarolo |first2=Paula |last3=Berbery |first3=Ernesto |year=2002 |title=Cold Season Synoptic-Scale Waves over Subtropical South America |url=http://journals.ametsoc.org/doi/abs/10.1175/1520-0493(2002)130%3C0684:CSSSWO%3E2.0.CO%3B2 |journal=Monthly Weather Review |publisher=American Meteorological Society |volume=130 |issue=3 |pages=684–699 |doi=10.1175/1520-0493(2002)130<0684:CSSSWO>2.0.CO;2 |access-date=12 March 2016|bibcode = 2002MWRv..130..684V }}</ref> This high pressure system brings cold and dry, polar continental air masses to Buenos Aires.<ref name=Bejaran2003/><ref name=Vera2002/> Cold fronts are more common during winter than in summer as the South Atlantic and South Pacific highs are at their southernmost positions during summer, making it difficult for cold fronts to enter.<ref name = Seluchi2000>{{cite journal |last1=Seluchi |first1=Marcelo |last2=Marengo |first2=José |year=2000 |title=Tropical-Midlatitude Exchange of Air Masses During Summer and Winter in South America: Climatic Aspects and Examples of Intense Events |url=http://onlinelibrary.wiley.com/doi/10.1002/1097-0088(200008)20:10%3C1167::AID-JOC526%3E3.0.CO;2-T/pdf |journal=International Journal of Climatology |publisher=Royal Meteorological Society |volume=20 |issue=10 |pages=1167–1190 |doi=10.1002/1097-0088(200008)20:10<1167::AID-JOC526>3.0.CO;2-T |access-date=13 March 2016}}</ref> |
||
The city is located in an area in which the Pampero and the [[Sudestada]] winds pass by.<ref name=CC>{{cite web |url=http://estatico.buenosaires.gov.ar/areas/med_ambiente/apra/des_sust/archivos/pacc/cap2_pacc_ba3030.pdf |title=Capítulo 2: Impacto en la Ciudad de Buenos Aires |work=Plan de Acción Buenos Aires 2030 |publisher=Gobierno de la Ciudad de Buenos Aires |language=Spanish |accessdate=29 December 2015}}</ref> Being located in the [[Pampas]], the weather is variable due to the contrasting air masses and [[Weather front|frontal storms]].{{sfn|Blouet|2010|p=391}} The Pampero wind brings in cold, dry air from the south while warm humid tropical air produces sultry ''nortes'' (a gentle wind usually from the northeast formed by [[trade winds]] and the South Atlantic High that brings cloudy, hot, and humid weather and is responsible for bringing heat waves).{{sfn|Blouet|2010|p=391}}<ref name=pampero>{{cite web |url= http://www.smn.gov.ar/?mod=biblioteca&id=73 |title= Viento Pampero |publisher= Servicio Meteorológico Nacional |language=Spanish |accessdate= 2 January 2016}}</ref><ref name=norte>{{cite web |url= http://www.oni.escuelas.edu.ar/2008/CORDOBA/1324/trabajo/viento.html | |
The city is located in an area in which the Pampero and the [[Sudestada]] winds pass by.<ref name=CC>{{cite web |url=http://estatico.buenosaires.gov.ar/areas/med_ambiente/apra/des_sust/archivos/pacc/cap2_pacc_ba3030.pdf |title=Capítulo 2: Impacto en la Ciudad de Buenos Aires |work=Plan de Acción Buenos Aires 2030 |publisher=Gobierno de la Ciudad de Buenos Aires |language=Spanish |accessdate=29 December 2015}}</ref> Being located in the [[Pampas]], the weather is variable due to the contrasting air masses and [[Weather front|frontal storms]].{{sfn|Blouet|2010|p=391}} The Pampero wind brings in cold, dry air from the south while warm humid tropical air produces sultry ''nortes'' (a gentle wind usually from the northeast formed by [[trade winds]] and the South Atlantic High that brings cloudy, hot, and humid weather and is responsible for bringing heat waves).{{sfn|Blouet|2010|p=391}}<ref name=pampero>{{cite web |url= http://www.smn.gov.ar/?mod=biblioteca&id=73 |title= Viento Pampero |publisher= Servicio Meteorológico Nacional |language=Spanish |accessdate= 2 January 2016}}</ref><ref name=norte>{{cite web |url= http://www.oni.escuelas.edu.ar/2008/CORDOBA/1324/trabajo/viento.html |title= Viento |publisher= Escuela Técnica IPEM 56 Abraham Juarez |language= Spanish |accessdate= 4 April 2016 |deadurl= yes |archiveurl= https://web.archive.org/web/20160502101718/http://www.oni.escuelas.edu.ar/2008/CORDOBA/1324/trabajo/viento.html |archivedate= 2 May 2016 |df= dmy-all }}</ref> Often, the passage of the Pampero winds occurs as a cold front passes through, leading to strong gusts from the south or southeast, a decrease in humidity and temperature, and an increase in the atmospheric pressure.<ref name=pampero/> When the cold Pampero winds meet with warm humid air from the north, thunderstorms are produced.{{sfn|Blouet|2010|p=391}} The Sudestada winds are formed when a high pressure system located in southern Argentina interacts with a low pressure system over [[Uruguay]] and southern [[Brazil]].{{sfn|Isla|2009|p=57}} When Sudestadas form, they bring long periods of precipitation, cloudy weather and cooler temperatures.{{sfn|Fittkau|1969|p=73}}{{sfn|Veblen|2007|p=234}}<ref name=sudestada>{{cite web |url= http://www.smn.gov.ar/?mod=biblioteca&id=71 |title= Sudestada | publisher = Servicio Meteorológico Nacional |language=Spanish | accessdate = 11 June 2015}}</ref> These are common during the winter months.<ref name=sudestada/> Because the Sudestada brings the highest wind speeds (particularly when these winds are combined with the [[astronomical tide]]s), the Sudestada is responsible for [[flood]]s that occur in low-lying areas.<ref name=Barros2006>{{cite web |last1=Barros |first1=Vicente |last2=Menéndez |first2=Angel |last3=Natenzon |first3=Claudia |last4=Kokot |first4=Roberto |last5=Codignotto |first5=Jorge |last6=Re |first6=Mariano |last7=Bronstein |first7=Pablo |last8=Camilloni |first8=Inés |year=2006 |url= http://www.start.org/Projects/AIACC_Project/working_papers/Working%20Papers/AIACC_WP26_Barros%20(rev)%201.pdf |title= Vulnerability to floods in the metropolitan region of Buenos Aires under future climate change |work=AIACC Working Paper No. 26 |publisher= Assessments of Impacts and Adaptations to Climate Change (AIACC) |accessdate= 13 March 2016}}</ref> Its [[geomorphology]] along with inadequate drainage network and infrastructure, a flat landscape, and low elevations (much of Buenos Aires lies between {{convert|4|and|24|m|ft}} above sea level) makes Buenos Aires highly vulnerable to flooding, particularly during heavy rainfall.<ref name=Barros2006/>{{sfn|Kreimer|2000|p=28-29}}{{sfn|Kreimer|2000|p=32}}{{sfn|Kreimer|2000|p=36}} Flooding impacts the neighbourhoods [[La Boca]] and [[Barracas, Buenos Aires|Barracas]] which are in the southern parts of the city, more low-lying and inhabited by poor people (of low [[socioeconomic status]]).{{sfn|Kreimer|2000|p=33}} |
||
The [[urban heat island]] makes the city warmer than suburban and rural areas.<ref name=CC7>{{cite web |url=http://www.buenosaires.gob.ar/areas/med_ambiente/apra/des_sust/archivos/pacc/cap7_pacc_ba3030.pdf |title=Capítulo 7: Isla de calor urbana |work=Plan de Acción Buenos Aires 2030 |publisher=Gobierno de la Ciudad de Buenos Aires |language=Spanish |accessdate=14 February 2016}}</ref> On average, Buenos Aires is warmer than the surrounding areas by {{convert|1.5|to|3.5|C-change}} owing to the urban heat island.<ref name=CC7/> The average heat island is in summer than in winter.<ref name=Figuerola1998>{{cite journal |last1=Figuerola |first1=Patricia |last2=Mazzeo |first2=Nicolás |year=1998 |title=Urban-Rural Temperature Differences in Buenos Aires|url=http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1097-0088(199812)18:15%3C1709::AID-JOC338%3E3.0.CO;2-I/pdf |journal=International Journal of Climatology |publisher=John Wiley & Sons |volume=18 |issue=15 |pages=1709–1723 |doi=10.1002/(SICI)1097-0088(199812)18:15<1709::AID-JOC338>3.0.CO;2-I |access-date=14 February 2016|bibcode = 1998IJCli..18.1709F }}</ref> This varies by season; its influence during the day is the strongest in July than in January.<ref name=Figuerola1998/> In contrast, the urban heat island effect during nights is the most intense in January than in July.<ref name=Figuerola1998/> |
The [[urban heat island]] makes the city warmer than suburban and rural areas.<ref name=CC7>{{cite web |url=http://www.buenosaires.gob.ar/areas/med_ambiente/apra/des_sust/archivos/pacc/cap7_pacc_ba3030.pdf |title=Capítulo 7: Isla de calor urbana |work=Plan de Acción Buenos Aires 2030 |publisher=Gobierno de la Ciudad de Buenos Aires |language=Spanish |accessdate=14 February 2016}}</ref> On average, Buenos Aires is warmer than the surrounding areas by {{convert|1.5|to|3.5|C-change}} owing to the urban heat island.<ref name=CC7/> The average heat island is in summer than in winter.<ref name=Figuerola1998>{{cite journal |last1=Figuerola |first1=Patricia |last2=Mazzeo |first2=Nicolás |year=1998 |title=Urban-Rural Temperature Differences in Buenos Aires|url=http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1097-0088(199812)18:15%3C1709::AID-JOC338%3E3.0.CO;2-I/pdf |journal=International Journal of Climatology |publisher=John Wiley & Sons |volume=18 |issue=15 |pages=1709–1723 |doi=10.1002/(SICI)1097-0088(199812)18:15<1709::AID-JOC338>3.0.CO;2-I |access-date=14 February 2016|bibcode = 1998IJCli..18.1709F }}</ref> This varies by season; its influence during the day is the strongest in July than in January.<ref name=Figuerola1998/> In contrast, the urban heat island effect during nights is the most intense in January than in July.<ref name=Figuerola1998/> |
||
Revision as of 12:59, 9 August 2017
Buenos Aires, the capital of Argentina, has a temperate climate, which is classified as a humid subtropical climate (Cfa) under the Köppen climate classification with four distinct seasons. Summers are hot and humid with frequent thunderstorms while winters are cool and drier with frosts that occurs on average twice per year. Spring and fall are transition seasons characterized by changeable weather. At the central observatory,[note 1] the highest recorded temperature is 43.3 °C (109.9 °F) while the lowest recorded temperature is −5.4 °C (22.3 °F).
Different climatic factors influence the climate of Buenos Aires. The semi–permanent South Atlantic High influences its climate throughout the year by bringing in moist winds from the northeast, which bring most of the precipitation to the city in the form of frontal systems during winter or storms produced by cyclogenesis in autumn and winter. The hot temperatures and high insolation in the summer months form a low pressure system called the Chaco Low over northern Argentina, generating a pressure gradient that brings moist easterly winds to the city – because of this, summer is the rainiest season. In contrast, this low pressure system weakens in the winter, which combined with strong southerly winds results in a drier season due to weaker easterly winds. Being located in the Pampas, Buenos Aires has variable weather due to the passage of contrasting air mass – the cold, dry Pampero from the south and warm, humid tropical air from the north. The coastal location results in a strong maritime influence, causing extreme temperatures (hot or cold) to be rare.
General climatology
Buenos Aires is located in the humid subtropical climate zone (Köppen climate classification: Cfa).[3][4] Due to the maritime influences from the adjoining Atlantic Ocean,[2] its climate is temperate with extreme temperatures (both hot and cold) being rare.[5] Thus, cold air coming directly from the south are moderated by the Atlantic Ocean and warmer than winds from the southwest (which are not moderated by it).[6]
The climate of Buenos Aires is dominated by the semi–permanent South Atlantic High throughout the year.[3] This brings in moist winds from the northeast, which brings most of the precipitation to the city.[3] During winter, it brings in frontal systems responsible for precipitation in the city.[3] In autumn and summer, it produces storms that are generally located north of the city and produces strong winds from the south or southeast that can occasionally lead to the swelling of the Río de la Plata, flooding coastal areas.[3] The South Pacific High is the origin of polar air masses that are responsible for the coldest temperatures and result in clear and very dry conditions.[6] These air masses originate from the South Pacific high and move in a northeastern direction during winter towards Buenos Aires by passing.[6] Although it is polar maritime (this is a cool, moist air mass that forms from oceans located in the subarctic and arctic regions at the southern tip of South America), it becomes modified as it passes over the South American continent, becoming drier as it arrives at Buenos Aires.[6][7] This is because as the cold air masses from the South Pacific High move over the Pacific Ocean and the Andes and reach the land south of 35oS (where the Andes are shorter in height), anticyclogenesis leads to the formation of a strong high pressure system in the center of the country (at around 40oS).[6][8] This high pressure system brings cold and dry, polar continental air masses to Buenos Aires.[6][8] Cold fronts are more common during winter than in summer as the South Atlantic and South Pacific highs are at their southernmost positions during summer, making it difficult for cold fronts to enter.[9]
The city is located in an area in which the Pampero and the Sudestada winds pass by.[10] Being located in the Pampas, the weather is variable due to the contrasting air masses and frontal storms.[11] The Pampero wind brings in cold, dry air from the south while warm humid tropical air produces sultry nortes (a gentle wind usually from the northeast formed by trade winds and the South Atlantic High that brings cloudy, hot, and humid weather and is responsible for bringing heat waves).[11][12][13] Often, the passage of the Pampero winds occurs as a cold front passes through, leading to strong gusts from the south or southeast, a decrease in humidity and temperature, and an increase in the atmospheric pressure.[12] When the cold Pampero winds meet with warm humid air from the north, thunderstorms are produced.[11] The Sudestada winds are formed when a high pressure system located in southern Argentina interacts with a low pressure system over Uruguay and southern Brazil.[14] When Sudestadas form, they bring long periods of precipitation, cloudy weather and cooler temperatures.[15][16][17] These are common during the winter months.[17] Because the Sudestada brings the highest wind speeds (particularly when these winds are combined with the astronomical tides), the Sudestada is responsible for floods that occur in low-lying areas.[18] Its geomorphology along with inadequate drainage network and infrastructure, a flat landscape, and low elevations (much of Buenos Aires lies between 4 and 24 metres (13 and 79 ft) above sea level) makes Buenos Aires highly vulnerable to flooding, particularly during heavy rainfall.[18][19][20][21] Flooding impacts the neighbourhoods La Boca and Barracas which are in the southern parts of the city, more low-lying and inhabited by poor people (of low socioeconomic status).[22]
The urban heat island makes the city warmer than suburban and rural areas.[23] On average, Buenos Aires is warmer than the surrounding areas by 1.5 to 3.5 °C (2.7 to 6.3 °F) owing to the urban heat island.[23] The average heat island is in summer than in winter.[24] This varies by season; its influence during the day is the strongest in July than in January.[24] In contrast, the urban heat island effect during nights is the most intense in January than in July.[24]
The El Niño–Southern Oscillation is a major factor in the variation of annual precipitation within Buenos Aires and the Pampas, particularly during spring and summer.[25][26] During an El Niño year, precipitation is higher,[26] with a significant increase in precipitation from November to January.[27] In contrast, La Niña years are associated with lower precipitation;[26] precipitation is below average during October–December.[27]
Seasonal weather
Spring
Springs in Buenos Aires are typically mild during the day with cool to cold nights.[28] The average high is 22.5 °C (72.5 °F) while the average low is 13.2 °C (55.8 °F).[28] It is one of the rainiest seasons in the city, averaging 316.5 mm (12.46 in) of precipitation and 28 days with measurable precipitation.[28] Nonetheless, most precipitation events are short in duration.[5]
Spring is characterized by changeable weather with temperatures that can fluctuate.[29] Cold polar air from the south can bring cooler temperatures. An extreme example of this was in November 2007, when cold polar air from the south brought temperatures down to 2.5 °C (36.5 °F) on the morning of November 15.[30] The same polar air affected many parts of the country, bringing cold temperatures and snow in coastal parts of Patagonia.[30] In contrast, hot humid air from the north produces sultry days;[11] the highest temperature recorded in spring is 36.8 °C (98.2 °F) on 27 November 1955.[28] In some cases, heat waves,[note 2] can occur, particularly in November.[31]
Summer
Summers are hot and humid.[5] On average, mornings and afternoons are hot whereas temperatures drop considerably at night.[5] The average high is 29.1 °C (84.4 °F) while the average low is 19.3 °C (66.7 °F).[32] With a mean precipitation of 384.8 mm (15.15 in), it is the rainiest season.[32] This is due to hot temperatures and high insolation that lead to the development of a low pressure system called the Chaco Low situated over northern Argentina that interacts with the South Atlantic High to generate a pressure gradient that brings moist easterly winds to the region, favouring precipitation, which mostly occurs in the form of convective thunderstorms.[33][34] The Chaco Low also interacts with the South Atlantic high to bring warm and tropical air from the north which is the strongest in summer when the Chaco Low is at its strongest due to higher insolation.[9]
Heat waves are a common feature of summers in the city.[32] These heat waves place extra demand on electricity usage, leading to shortages.[35][36] In extreme cases, these power shortages during heat waves can cause traffic jams and protests, such as the December 2013 heat wave (longest heat wave ever recorded in Buenos Aires)[37] where increased energy demand lead to energy shortages and power cuts, protests against the government over the lack of service, and traffic jams as a result of these protests.[36] However, most heat waves are of short duration (usually less than a week),[32] and are followed by the passage of the cold, dry Pampero wind, which brings violent and intense thunderstorms with strong gusts and hail followed by cooler temperatures and lower humidity.[11][12][38][39] Occasionally, a tornado can form, which can strike the city although most tornadoes are relatively weak and rarely cause deaths.[40] The greatest risk for tornadoes occurs in the summer season due to the favourable conditions.[40] These severe storms can damage cars, houses and disrupt public services such as transportation and collection and disposal of urban solid waste.[41]: 39
Autumn
At the beginning of autumn, temperatures are warm to hot in the afternoon while nights and mornings are mild.[42] Later on in the season, conditions are cooler featuring mild afternoons, and cold nights and mornings.[42] The average high and low are 23.0 °C (73.4 °F) and 14.0 °C (57.2 °F) respectively while precipitation averages 351.4 mm (13.83 in) during this season.[42] Similar to spring, the season is characterized by changeable weather conditions with temperatures that can fluctuate;[29] temperatures as high as 37.9 °C (100.2 °F) and as low as −4.0 °C (24.8 °F) have been recorded.[42] Periods of rainy weather occur although these are usually of short duration.[5] Frosts rarely occur, though they can occur as early as May.[43]
Winter
 Snow in Plaza de Mayo in 1918 |
 Snow in Buenos Aires in 2007 |
June to August are the winter months in Buenos Aires.[44] Winters are cold with mild temperatures during the day and cold nights.[5] Highs during the season average 16.3 °C (61.3 °F) while lows average 8.1 °C (46.6 °F).[44] Lows rarely drop below 0 °C (32.0 °F), averaging 2 days each year at the central observatory,[note 1][43] and 1 day at Aeroparque.[45] Cold waves can occur in these months in which periods of cold temperatures can persist for days.[44][note 3] These cold waves, particularly during severe winters lead to increases in energy demand, which can cause significant energy shortages.[2] Snowfall occasionally occurs in the surrounding areas of the city but rarely within Buenos Aires proper; since the start of meteorological observations in 1906 at the central observatory, snowfall has only been observed thrice: on 9 July 2007 during a winter storm, June 1918, and July 1928.[2] This is due to the city center having higher temperatures than the surrounding areas owing to the urban heat island effect.[2][10]
Most of the precipitation comes from frontal systems associated with cyclogenesis and strong southeasterly winds (Sudestada), which bring long periods of precipitation, cloudy weather and cooler temperatures.[15][16][17] Winters are cloudy while relative humidity is very high, often 90% or higher, making the weather dull, grey and cool.[47] Occasionally, warm air masses from the north bring warmer temperatures.[6] These warm air masses can bring sunny weather, particularly during the afternoon when they come from the north or northwest as a result of a trough located in central Argentina.[6] On the other hand, warm air masses from Brazil bring humid conditions, featuring high humidity with high cloud cover that is typical of a warm front of a frontal system and typical of tropical maritime air.[6] These warm air masses that are responsible for the high humidity and cloud cover are the warmest air masses, leading to the warmest temperatures.[6] Nonetheless, these are short lived as the Chaco Low, which is responsible for bringing in warm and tropical air from the north is weaker in winter due to lower insolation, leading to the winds from the north being less intense and shorter lived.[9]
Towards the end of winter in August, there are important changes in the atmospheric circulation.[48] Warm, humid air penetrates the city, higher solar radiation and frequent synoptic weather disturbances from the west occur during the end of the winter.[48] As such, the end of winter is usually characterized by heavy storms with lightning.[48][49] This is popularly known as the Santa Rosa Storm, around August 30.[48][49] Based on 107 years of weather observations (1906–2012) from the central observatory, 58 years have seen stormy weather occurring on days close to August 30, although not all of these have led to heavy precipitation.[48]
Extremes
Temperature
According to the central observatory, which has one of the most reliable and oldest records in South America,[2] the highest temperature in Buenos Aires, 43.3 °C (109.9 °F), was recorded on 29 January 1957 while the lowest temperature recorded is −5.4 °C (22.3 °F) on 9 July 1918.[32][44] The warmest year on record is 2015, with a mean annual temperature of 18.6 °C (65.5 °F).[50] On the other hand, 1911 was the coldest year, with a mean annual temperature of 15.4 °C (59.7 °F).[51]
| Parameter | Jan[52] | Feb[53] | Mar[54] | Apr[55] | May[56] | June[57] | Jul[58] | Aug[59] | Sept[60] | Oct[61] | Nov[62] | Dec[63] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Warmest mean monthly temperature | 26.6 °C (79.9 °F) | 25.7 °C (78.3 °F) | 24.5 °C (76.1 °F) | 20.4 °C (68.7 °F) | 17.9 °C (64.2 °F) | 15.1 °C (59.2 °F) | 15.9 °C (60.6 °F) | 15.2 °C (59.4 °F) | 16.6 °C (61.9 °F) | 20.0 °C (68.0 °F) | 24.1 °C (75.4 °F) | 26.6 °C (79.9 °F) |
| Coldest mean monthly temperature | 21.7 °C (71.1 °F) | 20.0 °C (68.0 °F) | 18.1 °C (64.6 °F) | 14.2 °C (57.6 °F) | 9.8 °C (49.6 °F) | 5.7 °C (42.3 °F) | 6.8 °C (44.2 °F) | 8.9 °C (48.0 °F) | 10.7 °C (51.3 °F) | 13.6 °C (56.5 °F) | 16.7 °C (62.1 °F) | 19.8 °C (67.6 °F) |
| Highest minimum temperature | 28.2 °C (82.8 °F) | 27.1 °C (80.8 °F) | 27.7 °C (81.9 °F) | 23.8 °C (74.8 °F) | 22.6 °C (72.7 °F) | 20.1 °C (68.2 °F) | 20.8 °C (69.4 °F) | 20.9 °C (69.6 °F) | 23.7 °C (74.7 °F) | 22.4 °C (72.3 °F) | 25.4 °C (77.7 °F) | 28.2 °C (82.8 °F) |
| Lowest maximum temperature | 17.5 °C (63.5 °F) | 15.9 °C (60.6 °F) | 13.8 °C (56.8 °F) | 11.1 °C (52.0 °F) | 7.3 °C (45.1 °F) | 4.3 °C (39.7 °F) | 4.8 °C (40.6 °F) | 6.4 °C (43.5 °F) | 7.0 °C (44.6 °F) | 9.6 °C (49.3 °F) | 13.0 °C (55.4 °F) | 15.9 °C (60.6 °F) |
Precipitation
The year with the maximum precipitation was 1900, when the city received 2,024 mm (79.7 in) of precipitation.[64] On the other hand, 1916 has been the driest year, with a mean annual precipitation of 504 mm (19.8 in).[65] The highest precipitation for a single day was recorded on 27 February 1930, when 194.1 mm (7.64 in) of precipitation fell.[32]
| Parameter | Jan[52] | Feb[53] | Mar[54] | Apr[55] | May[56] | June[57] | July[58] | Aug[59] | Sept[60] | Oct[61] | Nov[62] | Dec[63] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wettest monthly precipitation | 347.5 mm (13.7 in) | 420.3 mm (16.5 in) | 476.6 mm (18.8 in) | 404.8 mm (15.9 in) | 361.7 mm (14.2 in) | 178.5 mm (7.0 in) | 212.1 mm (8.4 in) | 277.8 mm (10.9 in) | 260.1 mm (10.2 in) | 367.1 mm (14.5 in) | 284.1 mm (11.2 in) | 318.5 mm (12.5 in) |
| Driest monthly precipitation | 3.4 mm (0.1 in) | 0.7 mm (0.03 in) | 2.2 mm (0.1 in) | 5.0 mm (0.2 in) | 0.5 mm (0.02 in) | 0.2 mm (0.01 in) | 0.0 mm (0 in) | 0.0 mm (0 in) | 1.7 mm (0.1 in) | 4.1 mm (0.2 in) | 11.9 mm (0.5 in) | 5.9 mm (0.2 in) |
| Highest precipitation in a single day | 172.7 mm (6.8 in) | 194.1 mm (7.6 in) | 109.0 mm (4.3 in) | 159.0 mm (6.3 in) | 188.4 mm (7.4 in) | 78.7 mm (3.1 in) | 90.0 mm (3.5 in) | 96.8 mm (3.8 in) | 103.6 mm (4.1 in) | 132.0 mm (5.2 in) | 138.5 mm (5.5 in) | 124.1 mm (4.9 in) |
Statistics
| Climate data for Buenos Aires Central Observatory, located in Villa Ortúzar[1] (1981–2010, extremes 1906–present) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 43.3 (109.9) |
38.7 (101.7) |
37.9 (100.2) |
36.0 (96.8) |
31.6 (88.9) |
28.5 (83.3) |
30.2 (86.4) |
34.4 (93.9) |
35.3 (95.5) |
35.6 (96.1) |
36.8 (98.2) |
40.5 (104.9) |
43.3 (109.9) |
| Mean daily maximum °C (°F) | 30.1 (86.2) |
28.6 (83.5) |
26.8 (80.2) |
22.9 (73.2) |
19.3 (66.7) |
16.0 (60.8) |
15.4 (59.7) |
17.7 (63.9) |
19.3 (66.7) |
22.6 (72.7) |
25.6 (78.1) |
28.5 (83.3) |
22.7 (72.9) |
| Daily mean °C (°F) | 24.9 (76.8) |
23.6 (74.5) |
21.9 (71.4) |
17.9 (64.2) |
14.5 (58.1) |
11.7 (53.1) |
11.0 (51.8) |
12.8 (55.0) |
14.6 (58.3) |
17.8 (64.0) |
20.7 (69.3) |
23.3 (73.9) |
17.9 (64.2) |
| Mean daily minimum °C (°F) | 20.1 (68.2) |
19.3 (66.7) |
17.7 (63.9) |
13.8 (56.8) |
10.7 (51.3) |
8.0 (46.4) |
7.4 (45.3) |
8.8 (47.8) |
10.3 (50.5) |
13.3 (55.9) |
15.9 (60.6) |
18.4 (65.1) |
13.6 (56.5) |
| Record low °C (°F) | 5.9 (42.6) |
4.2 (39.6) |
2.8 (37.0) |
−2.3 (27.9) |
−4 (25) |
−5.3 (22.5) |
−5.4 (22.3) |
−4 (25) |
−2.4 (27.7) |
−2 (28) |
1.6 (34.9) |
3.7 (38.7) |
−5.4 (22.3) |
| Average precipitation mm (inches) | 138.8 (5.46) |
127.1 (5.00) |
140.1 (5.52) |
119.0 (4.69) |
92.3 (3.63) |
58.8 (2.31) |
60.6 (2.39) |
64.2 (2.53) |
72.0 (2.83) |
127.2 (5.01) |
117.3 (4.62) |
118.9 (4.68) |
1,236.3 (48.67) |
| Average precipitation days (≥ 0.1 mm) | 9 | 8 | 9 | 9 | 7 | 7 | 7 | 7 | 7 | 10 | 10 | 9 | 99 |
| Source: Servicio Meteorológico Nacional[52][53][54][55][56][57][58][59][60][61][62][63] | |||||||||||||
| Climate data for Buenos Aires Central Observatory (1961–1990) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 29.9 (85.8) |
28.6 (83.5) |
26.3 (79.3) |
22.8 (73.0) |
19.3 (66.7) |
15.7 (60.3) |
15.4 (59.7) |
17.1 (62.8) |
19.3 (66.7) |
22.1 (71.8) |
25.2 (77.4) |
28.2 (82.8) |
22.5 (72.5) |
| Daily mean °C (°F) | 24.5 (76.1) |
23.4 (74.1) |
21.3 (70.3) |
17.6 (63.7) |
14.4 (57.9) |
11.2 (52.2) |
11.0 (51.8) |
12.3 (54.1) |
14.4 (57.9) |
17.2 (63.0) |
20.3 (68.5) |
23.0 (73.4) |
17.5 (63.5) |
| Mean daily minimum °C (°F) | 19.6 (67.3) |
18.9 (66.0) |
16.9 (62.4) |
13.3 (55.9) |
10.4 (50.7) |
7.7 (45.9) |
7.6 (45.7) |
8.3 (46.9) |
10.0 (50.0) |
12.7 (54.9) |
15.4 (59.7) |
18.1 (64.6) |
13.2 (55.8) |
| Average precipitation mm (inches) | 119.0 (4.69) |
117.6 (4.63) |
134.1 (5.28) |
97.0 (3.82) |
73.6 (2.90) |
62.6 (2.46) |
66.3 (2.61) |
69.8 (2.75) |
73.3 (2.89) |
119.0 (4.69) |
108.6 (4.28) |
105.0 (4.13) |
1,145.9 (45.11) |
| Average precipitation days (≥ 0.1 mm) | 9 | 8 | 9 | 8 | 8 | 7 | 8 | 8 | 7 | 10 | 9 | 9 | 100 |
| Average relative humidity (%) | 64 | 68 | 72 | 76 | 77 | 79 | 79 | 74 | 70 | 69 | 66 | 63 | 71 |
| Mean monthly sunshine hours | 279.0 | 240.8 | 229.0 | 220.0 | 173.6 | 132.0 | 142.6 | 173.6 | 189.0 | 227.0 | 252.0 | 266.6 | 2,525.2 |
| Source 1: NOAA[66] | |||||||||||||
| Source 2: Servicio Meteorológico Nacional (precipitation days),[67] Deutscher Wetterdienst (sun)[68][note 4] | |||||||||||||
| Climate data for Jorge Newbery Airfield, located in Palermo (1961–1990) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 37.3 (99.1) |
37.4 (99.3) |
35.9 (96.6) |
31.6 (88.9) |
28.2 (82.8) |
24.1 (75.4) |
25.5 (77.9) |
29.0 (84.2) |
29.4 (84.9) |
31.2 (88.2) |
34.3 (93.7) |
37.5 (99.5) |
37.5 (99.5) |
| Mean daily maximum °C (°F) | 28.6 (83.5) |
27.4 (81.3) |
25.3 (77.5) |
21.8 (71.2) |
18.3 (64.9) |
15.0 (59.0) |
14.5 (58.1) |
15.9 (60.6) |
17.9 (64.2) |
20.9 (69.6) |
24.2 (75.6) |
27.1 (80.8) |
21.4 (70.5) |
| Daily mean °C (°F) | 24.3 (75.7) |
23.3 (73.9) |
21.4 (70.5) |
17.9 (64.2) |
14.7 (58.5) |
11.4 (52.5) |
11.1 (52.0) |
12.2 (54.0) |
14.1 (57.4) |
17.1 (62.8) |
20.1 (68.2) |
22.8 (73.0) |
17.5 (63.5) |
| Mean daily minimum °C (°F) | 20.3 (68.5) |
19.7 (67.5) |
17.9 (64.2) |
14.6 (58.3) |
11.5 (52.7) |
8.4 (47.1) |
8.2 (46.8) |
9.1 (48.4) |
10.7 (51.3) |
13.4 (56.1) |
16.2 (61.2) |
18.8 (65.8) |
14.1 (57.4) |
| Record low °C (°F) | 10.5 (50.9) |
10.5 (50.9) |
7.6 (45.7) |
3.8 (38.8) |
0.0 (32.0) |
−1.0 (30.2) |
0.0 (32.0) |
0.3 (32.5) |
0.6 (33.1) |
2.4 (36.3) |
5.8 (42.4) |
7.0 (44.6) |
−1.0 (30.2) |
| Average precipitation mm (inches) | 98.4 (3.87) |
107.6 (4.24) |
125.4 (4.94) |
88.6 (3.49) |
71.1 (2.80) |
55.5 (2.19) |
62.0 (2.44) |
66.7 (2.63) |
65.8 (2.59) |
110.5 (4.35) |
104.8 (4.13) |
96.6 (3.80) |
1,053 (41.46) |
| Average precipitation days (≥ 0.1 mm) | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 10 | 9 | 9 | 94 |
| Average relative humidity (%) | 68 | 71 | 73 | 75 | 77 | 78 | 80 | 75 | 73 | 72 | 69 | 67 | 73 |
| Mean monthly sunshine hours | 251.1 | 238.0 | 226.3 | 192.0 | 161.2 | 123.0 | 133.3 | 170.5 | 189.0 | 217.0 | 231.0 | 241.8 | 2,374.2 |
| Percent possible sunshine | 56 | 63 | 60 | 57 | 50 | 42 | 43 | 50 | 52 | 54 | 55 | 54 | 53 |
| Source 1: NOAA[69] | |||||||||||||
| Source 2: Servicio Meteorológico Nacional (precipitation days)[67] | |||||||||||||
| Climate data for Ministro Pistarini International Airport, located in Ezeiza (1961–1990) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 41.2 (106.2) |
37.4 (99.3) |
37.6 (99.7) |
31.3 (88.3) |
30.2 (86.4) |
25.5 (77.9) |
31.5 (88.7) |
28.2 (82.8) |
31.2 (88.2) |
32.2 (90.0) |
36.6 (97.9) |
38.7 (101.7) |
41.2 (106.2) |
| Mean daily maximum °C (°F) | 30.1 (86.2) |
28.6 (83.5) |
26.2 (79.2) |
22.6 (72.7) |
19.0 (66.2) |
15.3 (59.5) |
15.2 (59.4) |
16.8 (62.2) |
19.1 (66.4) |
21.7 (71.1) |
25.1 (77.2) |
28.4 (83.1) |
22.3 (72.1) |
| Daily mean °C (°F) | 23.4 (74.1) |
22.3 (72.1) |
19.9 (67.8) |
16.2 (61.2) |
12.9 (55.2) |
9.8 (49.6) |
9.7 (49.5) |
10.7 (51.3) |
12.9 (55.2) |
15.9 (60.6) |
19.0 (66.2) |
21.9 (71.4) |
16.2 (61.2) |
| Mean daily minimum °C (°F) | 17.0 (62.6) |
16.4 (61.5) |
14.3 (57.7) |
10.8 (51.4) |
7.7 (45.9) |
5.1 (41.2) |
5.0 (41.0) |
5.5 (41.9) |
7.3 (45.1) |
10.1 (50.2) |
12.7 (54.9) |
15.4 (59.7) |
10.6 (51.1) |
| Record low °C (°F) | 6.5 (43.7) |
3.8 (38.8) |
3.1 (37.6) |
0.4 (32.7) |
−5.0 (23.0) |
−5.8 (21.6) |
−5.8 (21.6) |
−3.8 (25.2) |
−4.2 (24.4) |
−0.6 (30.9) |
1.5 (34.7) |
3.0 (37.4) |
−5.8 (21.6) |
| Average precipitation mm (inches) | 91.5 (3.60) |
100.8 (3.97) |
110.4 (4.35) |
84.4 (3.32) |
71.8 (2.83) |
48.5 (1.91) |
56.8 (2.24) |
58.4 (2.30) |
62.0 (2.44) |
108.5 (4.27) |
98.0 (3.86) |
93.2 (3.67) |
984.3 (38.75) |
| Average precipitation days (≥ 0.1 mm) | 8 | 8 | 8 | 7 | 7 | 6 | 8 | 7 | 7 | 10 | 9 | 8 | 93 |
| Average relative humidity (%) | 66 | 70 | 74 | 79 | 80 | 80 | 81 | 77 | 73 | 73 | 70 | 66 | 74 |
| Source 1: NOAA[70] | |||||||||||||
| Source 2: Servicio Meteorológico Nacional (precipitation days)[67] | |||||||||||||
| Climate data for Buenos Aires Central Observatory (2001–2010) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 30.4 (86.7) |
29.0 (84.2) |
26.8 (80.2) |
23.4 (74.1) |
19.3 (66.7) |
16.6 (61.9) |
16.0 (60.8) |
17.7 (63.9) |
19.6 (67.3) |
23.1 (73.6) |
26.1 (79.0) |
28.5 (83.3) |
23.0 (73.4) |
| Daily mean °C (°F) | 25.1 (77.2) |
23.9 (75.0) |
22.0 (71.6) |
18.0 (64.4) |
14.4 (57.9) |
11.9 (53.4) |
11.4 (52.5) |
12.8 (55.0) |
14.8 (58.6) |
18.2 (64.8) |
20.9 (69.6) |
23.2 (73.8) |
18.1 (64.6) |
| Mean daily minimum °C (°F) | 20.2 (68.4) |
19.5 (67.1) |
18.0 (64.4) |
13.6 (56.5) |
10.5 (50.9) |
8.3 (46.9) |
7.7 (45.9) |
8.7 (47.7) |
10.6 (51.1) |
13.5 (56.3) |
16.0 (60.8) |
18.2 (64.8) |
13.7 (56.7) |
| Average precipitation mm (inches) | 167.5 (6.59) |
171.0 (6.73) |
172.3 (6.78) |
110.8 (4.36) |
72.3 (2.85) |
54.8 (2.16) |
70.0 (2.76) |
71.7 (2.82) |
75.0 (2.95) |
124.4 (4.90) |
114.1 (4.49) |
102.4 (4.03) |
1,306.3 (51.43) |
| Average precipitation days | 9.5 | 9.0 | 10.0 | 7.9 | 6.6 | 7.1 | 8.0 | 7.7 | 7.9 | 9.9 | 9.9 | 9.1 | 102.6 |
| Mean monthly sunshine hours | 275.9 | 217.5 | 210.8 | 183.0 | 167.4 | 144.0 | 148.8 | 167.4 | 180.0 | 220.1 | 252.0 | 272.8 | 2,439.7 |
| Mean daily sunshine hours | 8.9 | 7.7 | 6.8 | 6.1 | 5.4 | 4.8 | 4.8 | 5.4 | 6.0 | 7.1 | 8.4 | 8.8 | 6.68 |
| Source: University of Buenos Aires[71] | |||||||||||||
| Climate data for Buenos Aires Central Observatory (1991–2000) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 29.3 (84.7) |
28.2 (82.8) |
27.3 (81.1) |
22.6 (72.7) |
19.6 (67.3) |
15.9 (60.6) |
15.0 (59.0) |
18.0 (64.4) |
19.5 (67.1) |
22.3 (72.1) |
25.3 (77.5) |
28.8 (83.8) |
22.7 (72.9) |
| Daily mean °C (°F) | 23.8 (74.8) |
22.8 (73.0) |
22.0 (71.6) |
17.7 (63.9) |
14.8 (58.6) |
11.7 (53.1) |
10.5 (50.9) |
12.7 (54.9) |
14.3 (57.7) |
17.1 (62.8) |
19.8 (67.6) |
22.9 (73.2) |
17.5 (63.5) |
| Mean daily minimum °C (°F) | 19.8 (67.6) |
18.8 (65.8) |
18.0 (64.4) |
14.0 (57.2) |
11.3 (52.3) |
8.5 (47.3) |
7.1 (44.8) |
8.8 (47.8) |
10.4 (50.7) |
13.3 (55.9) |
15.8 (60.4) |
18.6 (65.5) |
13.7 (56.7) |
| Average precipitation mm (inches) | 127 (5.0) |
88 (3.5) |
94 (3.7) |
140 (5.5) |
112 (4.4) |
71 (2.8) |
59 (2.3) |
58 (2.3) |
64 (2.5) |
118 (4.6) |
107 (4.2) |
151 (5.9) |
1,189 (46.8) |
| Average relative humidity (%) | 66 | 69 | 71 | 75 | 78 | 80 | 78 | 75 | 69 | 69 | 66 | 64 | 72 |
| Percent possible sunshine | 63.2 | 59.3 | 58.0 | 46.8 | 53.4 | 44.7 | 49.5 | 55.2 | 51.4 | 49.7 | 58.8 | 59.7 | 54.1 |
| Source: Univerisdad Nacional de La Plata[72] | |||||||||||||
| Climate data for Buenos Aires Central Observatory (1981–1990) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 30.4 (86.7) |
28.7 (83.7) |
26.4 (79.5) |
22.7 (72.9) |
19.0 (66.2) |
15.6 (60.1) |
14.9 (58.8) |
17.3 (63.1) |
18.9 (66.0) |
22.5 (72.5) |
25.3 (77.5) |
28.1 (82.6) |
22.5 (72.5) |
| Daily mean °C (°F) | 25.1 (77.2) |
23.7 (74.7) |
21.4 (70.5) |
17.7 (63.9) |
14.3 (57.7) |
11.2 (52.2) |
10.9 (51.6) |
12.7 (54.9) |
14.2 (57.6) |
17.7 (63.9) |
20.6 (69.1) |
23.2 (73.8) |
17.7 (63.9) |
| Mean daily minimum °C (°F) | 20.4 (68.7) |
19.4 (66.9) |
17.0 (62.6) |
13.7 (56.7) |
10.3 (50.5) |
7.6 (45.7) |
7.4 (45.3) |
8.9 (48.0) |
9.9 (49.8) |
13.0 (55.4) |
15.9 (60.6) |
18.4 (65.1) |
13.5 (56.3) |
| Average precipitation mm (inches) | 121.6 (4.79) |
122.6 (4.83) |
153.9 (6.06) |
106.9 (4.21) |
92.1 (3.63) |
50.0 (1.97) |
52.9 (2.08) |
63.2 (2.49) |
77.7 (3.06) |
139.3 (5.48) |
131.2 (5.17) |
103.2 (4.06) |
1,214.6 (47.82) |
| Average precipitation days (≥ 0.1 mm) | 9 | 9 | 9 | 9 | 8 | 6 | 7 | 8 | 7 | 10 | 10 | 9 | 101 |
| Average relative humidity (%) | 65 | 70 | 72 | 77 | 76 | 79 | 79 | 74 | 71 | 69 | 68 | 64 | 72 |
| Source: Servicio Meteorológico Nacional[73] | |||||||||||||
| Climate data for Jorge Newbery Airfield (1991–2000) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 27.5 (81.5) |
26.6 (79.9) |
25.6 (78.1) |
21.4 (70.5) |
18.4 (65.1) |
15.0 (59.0) |
13.9 (57.0) |
16.4 (61.5) |
18.1 (64.6) |
20.8 (69.4) |
23.9 (75.0) |
27.1 (80.8) |
21.2 (70.2) |
| Daily mean °C (°F) | 23.9 (75.0) |
23.0 (73.4) |
22.2 (72.0) |
18.2 (64.8) |
15.3 (59.5) |
12.1 (53.8) |
10.8 (51.4) |
12.9 (55.2) |
14.6 (58.3) |
17.5 (63.5) |
20.1 (68.2) |
23.0 (73.4) |
17.8 (64.0) |
| Mean daily minimum °C (°F) | 20.4 (68.7) |
19.6 (67.3) |
19.0 (66.2) |
15.1 (59.2) |
12.5 (54.5) |
9.4 (48.9) |
8.1 (46.6) |
9.7 (49.5) |
11.3 (52.3) |
14.2 (57.6) |
16.4 (61.5) |
19.2 (66.6) |
14.6 (58.3) |
| Average precipitation mm (inches) | 102.7 (4.04) |
86.2 (3.39) |
96.7 (3.81) |
126.2 (4.97) |
101.7 (4.00) |
65.6 (2.58) |
51.5 (2.03) |
51.9 (2.04) |
54.6 (2.15) |
98.4 (3.87) |
96.9 (3.81) |
133.6 (5.26) |
1,065.9 (41.96) |
| Average precipitation days (≥ 0.1 mm) | 7.7 | 6.8 | 6.6 | 10.4 | 6.4 | 7.9 | 6.0 | 5.3 | 7.1 | 9.2 | 8.7 | 8.6 | 90.7 |
| Average relative humidity (%) | 68.2 | 69.8 | 70.9 | 76.2 | 76.9 | 78.4 | 77.4 | 74.4 | 70.9 | 70.9 | 68.8 | 66.9 | 72.5 |
| Mean monthly sunshine hours | 291.4 | 245.8 | 232.5 | 177.0 | 176.7 | 138.0 | 164.3 | 195.3 | 195.0 | 210.8 | 258.0 | 282.1 | 2,566.9 |
| Percent possible sunshine | 66.9 | 65.7 | 61.3 | 52.8 | 56.2 | 47.2 | 53.0 | 58.2 | 54.4 | 51.9 | 61.9 | 63.9 | 57.8 |
| Source: Univerisdad de Flores[74] | |||||||||||||
| Climate data for Ministro Pistarini International Airport (1991–2000) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 29.5 (85.1) |
28.2 (82.8) |
27.2 (81.0) |
22.4 (72.3) |
19.0 (66.2) |
15.3 (59.5) |
14.5 (58.1) |
17.6 (63.7) |
19.0 (66.2) |
21.9 (71.4) |
25.0 (77.0) |
28.6 (83.5) |
22.3 (72.1) |
| Daily mean °C (°F) | 23.5 (74.3) |
22.3 (72.1) |
21.2 (70.2) |
16.8 (62.2) |
13.7 (56.7) |
10.6 (51.1) |
9.3 (48.7) |
11.6 (52.9) |
13.5 (56.3) |
16.6 (61.9) |
19.3 (66.7) |
22.5 (72.5) |
16.7 (62.1) |
| Mean daily minimum °C (°F) | 17.3 (63.1) |
16.3 (61.3) |
15.5 (59.9) |
11.7 (53.1) |
9.0 (48.2) |
6.4 (43.5) |
4.6 (40.3) |
6.1 (43.0) |
8.0 (46.4) |
11.0 (51.8) |
13.5 (56.3) |
16.2 (61.2) |
11.3 (52.3) |
| Average precipitation mm (inches) | 93.5 (3.68) |
73.0 (2.87) |
80.0 (3.15) |
120.2 (4.73) |
88.2 (3.47) |
61.8 (2.43) |
43.5 (1.71) |
51.4 (2.02) |
54.1 (2.13) |
101.1 (3.98) |
91.1 (3.59) |
114.7 (4.52) |
972.6 (38.29) |
| Average precipitation days (≥ 0.1 mm) | 6.8 | 6.3 | 6.7 | 10.1 | 6.6 | 7.7 | 6.1 | 5.9 | 6.8 | 9.4 | 8.8 | 8.5 | 89.7 |
| Average relative humidity (%) | 66.9 | 70.2 | 73.0 | 79.3 | 79.8 | 79.3 | 78.0 | 74.1 | 71.2 | 72.6 | 69.7 | 65.9 | 73.3 |
| Source: Univerisdad de Flores[75] | |||||||||||||
| Climate data for Ministro Pistarini International Airport (1981–1990) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | 30.6 (87.1) |
28.5 (83.3) |
26.3 (79.3) |
22.4 (72.3) |
18.8 (65.8) |
15.3 (59.5) |
14.9 (58.8) |
17.2 (63.0) |
19.0 (66.2) |
22.2 (72.0) |
25.3 (77.5) |
28.3 (82.9) |
22.4 (72.3) |
| Daily mean °C (°F) | 24.1 (75.4) |
22.8 (73.0) |
20.2 (68.4) |
16.5 (61.7) |
12.9 (55.2) |
9.8 (49.6) |
9.4 (48.9) |
11.3 (52.3) |
13.0 (55.4) |
16.5 (61.7) |
19.5 (67.1) |
22.1 (71.8) |
16.5 (61.7) |
| Mean daily minimum °C (°F) | 17.7 (63.9) |
17.0 (62.6) |
14.6 (58.3) |
11.3 (52.3) |
7.7 (45.9) |
5.2 (41.4) |
4.7 (40.5) |
5.9 (42.6) |
7.3 (45.1) |
10.5 (50.9) |
13.4 (56.1) |
15.7 (60.3) |
10.9 (51.6) |
| Average precipitation mm (inches) | 99.7 (3.93) |
110.2 (4.34) |
121.5 (4.78) |
81.7 (3.22) |
84.4 (3.32) |
41.2 (1.62) |
42.3 (1.67) |
48.2 (1.90) |
62.8 (2.47) |
123.6 (4.87) |
119.2 (4.69) |
87.4 (3.44) |
1,022.2 (40.24) |
| Average precipitation days (≥ 0.1 mm) | 8 | 8 | 9 | 8 | 7 | 6 | 7 | 7 | 6 | 10 | 10 | 9 | 95 |
| Average relative humidity (%) | 66 | 72 | 75 | 80 | 78 | 80 | 80 | 78 | 73 | 72 | 71 | 67 | 74 |
| Source: Servicio Meteorológico Nacional[76] | |||||||||||||
See also
Notes
- ^ a b The central observatory refers to the weather station located in Villa Ortúzar that has been operational since 1906,[1] having one of oldest and most reliable weather records in South America.[2]
- ^ According to the Argentine National Weather Service, a heat wave is defined when there are 3 consecutive days in where the minimum and maximum temperature exceed 22.0 °C (71.6 °F) and 32.3 °C (90.1 °F) respectively.[31]
- ^ According to the Argentine National Weather Service, a cold wave occurs when there are 3 consecutive days where both the minimum and maximum temperatures are less than 3.8 °C (38.8 °F) and 12.6 °C (54.7 °F) respectively[46]
- ^ The World Meteorological Organization Station ID for Buenos Aires Observatorio is 87585 Use this station ID to locate the sunshine duration
References
- ^ a b "Centenario de la Creación del Observatorio Central Buenos Aires, del Servicio Meteorológico Nacional" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 11 January 2016.
- ^ a b c d e f Pezza, Alexandre; Simmonds, Ian; Coelho, Caio (2010). "The unusual Buenos Aires snowfall of July 2007". Atmospheric Science Letters. 11 (4). John Wiley & Sons: 249–254. Bibcode:2010AtScL..11..249P. doi:10.1002/asl.283. Retrieved 25 September 2015.
- ^ a b c d e "Clima" (in Spanish). Atlas Ambiental de Buenos Aires. Archived from the original on 27 February 2014. Retrieved 24 December 2015.
- ^ Peel, M. C.; Finlayson B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification" (PDF). Hydrol. Earth Syst. Sci. 11 (5): 1633–1644. doi:10.5194/hess-11-1633-2007. ISSN 1027-5606.
{{cite journal}}: Unknown parameter|last-author-amp=ignored (|name-list-style=suggested) (help)CS1 maint: unflagged free DOI (link) - ^ a b c d e f "Clima" (in Spanish). Official Tourism site of Buenos Aires. Retrieved 24 December 2015.
- ^ a b c d e f g h i j Bejaran, R.; Camilloni, I. (2003). "Objective method for classifying air masses: an application to the analysis of Buenos Aires' (Argentina) urban heat island intensity" (PDF). Theoretical and Applied Climatology. 74 (1–2). Springer-Verlag: 93–103. Bibcode:2003ThApC..74...93B. doi:10.1007/s00704-002-0714-4. Retrieved 12 March 2016.
- ^ Blouet 2010, p. 33.
- ^ a b Vera, Carolina; Vigliarolo, Paula; Berbery, Ernesto (2002). "Cold Season Synoptic-Scale Waves over Subtropical South America". Monthly Weather Review. 130 (3). American Meteorological Society: 684–699. Bibcode:2002MWRv..130..684V. doi:10.1175/1520-0493(2002)130<0684:CSSSWO>2.0.CO;2. Retrieved 12 March 2016.
- ^ a b c Seluchi, Marcelo; Marengo, José (2000). "Tropical-Midlatitude Exchange of Air Masses During Summer and Winter in South America: Climatic Aspects and Examples of Intense Events". International Journal of Climatology. 20 (10). Royal Meteorological Society: 1167–1190. doi:10.1002/1097-0088(200008)20:10<1167::AID-JOC526>3.0.CO;2-T. Retrieved 13 March 2016.
- ^ a b "Capítulo 2: Impacto en la Ciudad de Buenos Aires" (PDF). Plan de Acción Buenos Aires 2030 (in Spanish). Gobierno de la Ciudad de Buenos Aires. Retrieved 29 December 2015.
- ^ a b c d e Blouet 2010, p. 391.
- ^ a b c "Viento Pampero" (in Spanish). Servicio Meteorológico Nacional. Retrieved 2 January 2016.
- ^ "Viento" (in Spanish). Escuela Técnica IPEM 56 Abraham Juarez. Archived from the original on 2 May 2016. Retrieved 4 April 2016.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ Isla 2009, p. 57.
- ^ a b Fittkau 1969, p. 73.
- ^ a b Veblen 2007, p. 234.
- ^ a b c "Sudestada" (in Spanish). Servicio Meteorológico Nacional. Retrieved 11 June 2015.
- ^ a b Barros, Vicente; Menéndez, Angel; Natenzon, Claudia; Kokot, Roberto; Codignotto, Jorge; Re, Mariano; Bronstein, Pablo; Camilloni, Inés (2006). "Vulnerability to floods in the metropolitan region of Buenos Aires under future climate change" (PDF). AIACC Working Paper No. 26. Assessments of Impacts and Adaptations to Climate Change (AIACC). Retrieved 13 March 2016.
- ^ Kreimer 2000, p. 28-29.
- ^ Kreimer 2000, p. 32.
- ^ Kreimer 2000, p. 36.
- ^ Kreimer 2000, p. 33.
- ^ a b "Capítulo 7: Isla de calor urbana" (PDF). Plan de Acción Buenos Aires 2030 (in Spanish). Gobierno de la Ciudad de Buenos Aires. Retrieved 14 February 2016.
- ^ a b c Figuerola, Patricia; Mazzeo, Nicolás (1998). "Urban-Rural Temperature Differences in Buenos Aires". International Journal of Climatology. 18 (15). John Wiley & Sons: 1709–1723. Bibcode:1998IJCli..18.1709F. doi:10.1002/(SICI)1097-0088(199812)18:15<1709::AID-JOC338>3.0.CO;2-I. Retrieved 14 February 2016.
- ^ Araus 2015, p. 47.
- ^ a b c Krishna 2015, p. 151.
- ^ a b Araus 2015, p. 48.
- ^ a b c d "La Primavera en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 2 January 2016.
- ^ a b "Buenos Aires". Encyclopædia Britannica. Retrieved 3 January 2016.
- ^ a b "Temperaturas Invernales en Pleno Noviembre" (in Spanish). Servicio Meteorológico Nacional. Retrieved 3 January 2016.
- ^ a b "Resumen Estadístico y Cronológico de las Olas de Calor en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 3 January 2016.
- ^ a b c d e f "El Verano en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 3 January 2016.
- ^ "Climate Overview" (PDF). Met Office. Retrieved 7 June 2015.
- ^ Veblen 2007, p. 233.
- ^ Bronstein, Hugh (31 December 2013). "Analysis: Fernandez image wilts in year–end heat wave". Reuters. Retrieved 3 January 2016.
- ^ a b "Buenos Aires residents protest over 'heatwave power cuts'". BBC News. 31 December 2013. Retrieved 3 January 2016.
- ^ "Informe Especial debido a la Ocurrencia de una Ola de Calor Excepcional en Argentina Durante Diciembre de 2013" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 3 January 2016.
- ^ "El Pampero, Un Viento del Sur Indómito y Mañero" (PDF) (in Spanish). Retrieved 10 January 2016.
- ^ Mezher, Romina; Doyle, Moira; Barros, Vicentre (2012). "Climatology of hail in Argentina". Atmospheric Research. 114–115 (1). Elsevier: 70–82. Bibcode:2012AtmRe.114...70M. doi:10.1016/j.atmosres.2012.05.020. Retrieved 19 September 2015.
- ^ a b "Tornados y tormentas eléctricas" (in Spanish). Ministerio de Salud. Retrieved 12 September 2015.
- ^ "Chapter 2: Assessment of Disaster Risk Management Strategies in Argentina" (PDF). Improving the Assessment of Disaster Risks to Strengthen Financial Resilience. World Bank. Retrieved 9 September 2015.
- ^ a b c d "El Otoño en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 3 January 2016.
- ^ a b "Heladas Meteorológicas: Buenos Aires OBS". Heladas en la Argentina (in Spanish). Facultad de Agronomía – Universidad de Buenos Aires. Retrieved 29 December 2015.
- ^ a b c d "El Invierno en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 24 December 2015.
- ^ "Heladas Meteorológicas: Aeroparque AERO". Heladas en la Argentina (in Spanish). Facultad de Agronomía – Universidad de Buenos Aires. Retrieved 29 December 2015.
- ^ "Resumen Estadístico y Cronologico de las Olas de Frio en La Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 9 December 2016.
- ^ Lydolph 1985, p. 334.
- ^ a b c d e "La Tormenta de Santa Rosa" (in Spanish). Servicio Meteorológico Nacional. Retrieved 2 January 2016.
- ^ a b "Geography and Climate of Argentina". Government of Argentina. Archived from the original on 20 December 2010. Retrieved 28 August 2015.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help) - ^ "Calor récord: 2015 fue el año más cálido de la historia en la Ciudad" (in Spanish). Clarín. Retrieved 6 March 2016.
- ^ "2015 is the hottest year on record for BA City". Buenos Aires Herald. Retrieved 6 March 2016.
- ^ a b c "El Mes de Enero en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Febrero en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Marzo en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Abril en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Mayo en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Junio en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Julio en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Agosto en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Septiembre en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Octubre en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Noviembre en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ a b c "El Mes de Diciembre en la Ciudad de Buenos Aires" (PDF) (in Spanish). Servicio Meteorológico Nacional. Retrieved 28 April 2016.
- ^ Rocha, Laura. "La huella del temido cambio climático: 2014 es el más lluvioso en 113 años en Buenos Aires" (in Spanish). La Nacion. Retrieved 7 March 2016.
- ^ "Précipitations Mensuelles à Buenos Aires (Argentine)" (in French). Météoclimat. Retrieved 7 March 2016.
- ^ "Buenos Aires Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 29 March 2017.
- ^ a b c "Valores Medios de Temperature y Precipitación-Capital Federal: Buenos Aires" (in Spanish). Servicio Meteorológico Nacional. Retrieved 29 March 2017.
- ^ "Station 87585 Buenos Aires Observatorio". Global station data 1961–1990—Sunshine Duration. Deutscher Wetterdienst. Retrieved 12 January 2016.
- ^ "Aeroparque B. Aires Aero Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 3 January 2016.
- ^ "Ezeiza Aero Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 11 January 2016.
- ^
- "Temperatura maxima media" (in Spanish). Departamento de Ciencias de la Atmósfera y los Océanos, University of Buenos Aires. Retrieved 16 March 2015.
- "Temperatura Media" (in Spanish). Departamento de Ciencias de la Atmósfera y los Océanos, University of Buenos Aires. Retrieved 16 March 2015.
- "Temperatura Mínima Media" (in Spanish). Departamento de Ciencias de la Atmósfera y los Océanos, University of Buenos Aires. Retrieved 16 March 2015.
- "Precipitación media mensual" (in Spanish). Departamento de Ciencias de la Atmósfera y los Océanos, University of Buenos Aires. Retrieved 16 March 2015.
- "Días con precipitación" (in Spanish). Departamento de Ciencias de la Atmósfera y los Océanos, University of Buenos Aires. Retrieved 16 March 2015.
- "Heliofanía (hs. del sol directo)" (in Spanish). Departamento de Ciencias de la Atmósfera y los Océanos, University of Buenos Aires. Retrieved 16 March 2015.
- ^ Czajkowski, Jorge; Gómez, Analía. "Especialización AYHS DOCUMENTO ANEXO TIF: Mejoramiento energéticoambiental de un ante-proyecto existente" (PDF) (in Spanish). Univerisdad Nacional de La Plata. pp. 10–13. Archived from the original (PDF) on 30 May 2017. Retrieved 30 May 2017.
- ^ "Datos Estadísticos (Período 1981–1990)" (in Spanish). Servicio Meteorológico Nacional. Retrieved 30 May 2017.
- ^ Priano, Maria. "Análisis Ambiental Urbano del Partido de Avellaneda" (PDF) (in Spanish). Universidad de Flores. pp. 125–130. Archived from the original (PDF) on 1 June 2017. Retrieved 31 May 2017.
- ^ Molina, Julíeta. "Análisis Ambiental Urbano del Partido de Lanús" (PDF) (in Spanish). Universidad de Flores. pp. 127–135. Archived from the original (PDF) on 30 May 2017. Retrieved 30 May 2017.
- ^ "Datos Estadísticos (Período 1981–1990)" (in Spanish). Servicio Meteorológico Nacional. Retrieved 30 May 2017.
Books
- Araus, José; Slafer, Gustavo (2015). Crop Stress Management and Global Climate Change. CAB International. ISBN 978-1-84593-680-8.
- Blouet, Brian; Blouet, Olwyn (2010). "Chapter 13: Argentina, Uruguay, and Paraguay". Latin America and the Caribbean: A Systematic and Regional Survey. John Wiley & Sons. pp. 385–415. ISBN 978-0-470-38773-3.
- Fittkau, E.; Illies, J.; Klinge, H.; Schwabe, G. (1969). Biogeography and Ecology in South America. Springer. ISBN 978-94-011-9731-1.
- Isla, Federico; Enrique, Schnack (2009). "Chapter 3: The Changing Coastlines of South America". In Latrubesse, Edgardo (ed.). Developments in Earth Surface Processes: Natural Hazards and Human–Exacerbated Disasters in Latin America (PDF). Elsevier. pp. 333–349. doi:10.1016/S0928-2025(08)10003-7. ISBN 978-0-444-53117-9.
- Kreimer, Alcira; Arnold, Margaret (2000). Managing Disaster Risk in Emerging Economies (PDF). Disaster Risk Management Series No. 2. Washington D.C: World Bank. ISBN 0-8213-4726-8.
- Krishna, K. (2015). Agricultural Prairies: Natural Resources and Crop Productivity. CRC Press. ISBN 978-1-4822-5806-6.
{{cite book}}: CS1 maint: ref duplicates default (link) - Lydolph, Paul (1985). The Climate of the Earth. Rowman & Littlefield Publishers, Inc. ISBN 0-86598-119-1.
{{cite book}}: CS1 maint: ref duplicates default (link) - Veblen, Thomas; Young, Kenneth; Orme, Antony, eds. (2007). The Physical Geography of South America. Oxford University Press. ISBN 978-0-19-531341-3.
