Wind Chill Calculator
Feel-like temperature from cold air and wind speed.
Feels like
6°F
-14°C
Frostbite time (exposed skin)
over an hour
Chill effect
14°F colder
Why wind makes cold colder
Still air insulates; wind strips the warm boundary layer off your skin, accelerating heat loss. The NWS formula models that convective loss on a human face — 20°F with 15 mph wind removes heat like 6°F still air.
It's about skin, not pipes
Wind chill predicts frostbite and hypothermia risk for people and animals — it can't cool objects below the actual air temperature, so pipes and car engines only care about the thermometer. Dress for the feels-like; plumb for the actual.
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