"Rainy Dayz" is the fourth single from Raekwon's debut album Only Built 4 Cuban Linx..., released as a promotional single in 1996, and released sometime in 1996. backed with "Rainy Dayz (remix)". The song features fellow Wu-Tang Clan rapper Ghostface Killah in the first verse and its in-house affiliate singer Blue Raspberry in the intro and chorus, with Raekwon rapping the second verse. The song samples the Michael Jackson cover of "Ain't No Sunshine" and dialogue from the film The Killer. The remix of the song samples "You Know How to Make Me Feel So Good" by Harold Melvin and the Blue Notes. This song is the longest song on the album.