GlenCalc

Wind chill calculator

Wind carries heat away from skin, so it feels colder than the thermometer says. The formula applies at or below 50 °F with winds of at least 3 mph.

Your answer

Wind chill6.2 °F

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How we worked it out

Updated as you change the numbers.

  1. Wind chill (°F) = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275T·V^0.16, with T in °F and V in mph.

Method and assumptions

This is the 2001 formula adopted by the US National Weather Service and Environment Canada, based on heat loss from the face at walking speed.

Questions

What is the wind chill at 20 °F with a 15 mph wind?

About 6 °F.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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