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Calculate feels-like temperature from air temp and wind speed with frostbite risk levels.
Wind chill is the perceived temperature felt on exposed skin due to the combination of air temperature and wind speed, calculated using the National Weather Service formula.
| Temp | 5 mph | 10 mph | 20 mph | 30 mph |
|---|---|---|---|---|
| 40°F / 4°C | 36°F | 34°F | 30°F | 28°F |
| 30°F / -1°C | 25°F | 21°F | 17°F | 15°F |
| 20°F / -7°C | 13°F | 9°F | 4°F | 1°F |
| 10°F / -12°C | 1°F | -4°F | -9°F | -12°F |
| 0°F / -18°C | -11°F | -16°F | -22°F | -26°F |
| -10°F / -23°C | -22°F | -28°F | -35°F | -39°F |
Formula
WC = 35.74 + 0.6215T − 35.75V^0.16 + 0.4275TV^0.16WC = Wind chill temperature in °F
T = Air temperature in °F
V = Wind speed in mph
Worked Example
Wind chill at 20°F with 15 mph wind
Did you know? The current NWS wind chill formula was adopted in 2001 based on clinical trials where volunteers walked in a wind tunnel at the University of Toronto (source: National Weather Service).
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