Feels Like Temperature Calculator
Calculate the feels-like temperature using heat index or wind chill based on actual temperature, humidity, and wind speed.
Feels Like Temperature
Feels-like temperature combines the effects of humidity (heat index) and wind (wind chill).
Wind Chill (used when temp ≤ 50°F / 10°C and wind > 3 mph):
Wind Chill = 35.74 + 0.6215T - 35.75(V^0.16) + 0.4275T(V^0.16)
Heat Index (used when temp ≥ 80°F / 27°C and humidity > 40%): Uses the Rothfusz regression equation from the US National Weather Service.
Danger levels (Heat Index):
- 80-90°F: Caution — fatigue possible
- 91-103°F: Extreme caution — heat cramps/exhaustion possible
- 103-124°F: Danger — heat stroke probable
- 125°F+: Extreme danger — heat stroke imminent
Danger levels (Wind Chill):
- 32 to 0°F: Cold — uncomfortable
- 0 to -20°F: Very cold — frostbite in 30 min
- Below -20°F: Extreme cold — frostbite in 10 min