Wind Chill Calculator
Wind chill is how cold the air feels on exposed skin once wind is taken into account. This uses the 2001 formula adopted by the US National Weather Service and Environment Canada, defined at 50 °F (10 °C) and below with wind above 3 mph.
Work out the wind chill
Frequently Asked Questions
The temperature it feels like on exposed skin, given the wind. Wind strips away the thin layer of warm air next to the skin, so heat is lost faster than in still air.
The formula is defined at 50 °F and below with wind above 3 mph. Outside that it returns a figure warmer than the air, which is meaningless, so this calculator declines rather than printing it.
No. Wind chill describes heat loss from skin. Wind makes an object reach air temperature faster, but never colder than the air.
The 2001 replacement for the older 1945 Siple and Passel formula, which overstated the effect.