THI is an abbreviation and can refer to:
- Temperature-Humidity Index
- Texas Heart Institute
- Tim Hortons Inc.
- Traffic Homicide Investigator
- Toomas Hendrik Ilves (born 1953), Estonian politician, 4th President of Estonia
- Tissue Harmonic Imaging, an advanced technique of ultrasonography.
|This disambiguation page lists articles associated with the title THI.
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