Wind Chill Calculator
Calculate wind chill temperature from air temperature and wind speed.
Supports Fahrenheit/Celsius and mph/km/h.
Wind Chill Temperature
Wind chill is the perceived decrease in temperature caused by wind on exposed skin.
NWS Wind Chill Formula (Fahrenheit):
WC = 35.74 + 0.6215T − 35.75(V^0.16) + 0.4275T(V^0.16)
Environment Canada Formula (Celsius):
WC = 13.12 + 0.6215T − 11.37(V^0.16) + 0.3965T(V^0.16)
Where:
- T = Air temperature
- V = Wind speed (mph or km/h)
Valid range:
- Temperature: at or below 50°F (10°C)
- Wind speed: above 3 mph (5 km/h)
Frostbite risk:
- Wind chill −18°C (0°F): Frostbite possible in 30 minutes
- Wind chill −28°C (−18°F): Frostbite possible in 10 minutes
- Wind chill −40°C (−40°F): Frostbite possible in 5 minutes