Heat Index Calculator
Calculate feels-like temperature in heat
°F
%
Formula
HI = -42.379 + 2.049T + 10.143R - 0.225TR ...
Rothfusz regression equation used by NWS.
Examples
90°F, 60% humidity
Feels like ~100°F.
Frequently Asked Questions
About Heat Index
Calculate the feels-like temperature when heat and humidity combine.
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