Wind Chill Calculator

Compute the felt-air temperature from wind speed and air temperature.

Temperature (°F)

Wind speed (mph)

Units

Wind chill

-8.9 °F

Frostbite onset

No frostbite risk at this temperature

Apparent temp °F (alt)

16.0 °F

Uses the NWS wind-chill formula. The formula only applies at temperatures below 50°F (10°C) and winds above 3 mph (4.8 km/h). At higher values the chart returns the air temperature.

About this tool

Type air temperature (°F or °C) and wind speed (mph or km/h). Get the NWS wind-chill index, the frostbite onset window, plus the official warning thresholds. Targets the r/winter, r/skiing, r/wintercycling, and r/Frostbite threads on 'is it safe to be outside'.

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