Wind chill calculator
In cold weather, wind takes heat away from the body faster. Type the air temperature and the wind speed: you get the wind chill.
Result
-19.5 °CWind chill
- In the other unit
- -3.1 °F
- Wind used
- 30 km/h
Inputs
- Air temperature
- -10
- Unit
- °C
- Wind speed (at 10 m)
- 30
- Wind unit
- km/h
How it is calculated
Joint NWS and Environment Canada formula (2001), with T in °C and V in km/h:
Result
Wind chill
- In the other unit
- -3.1 °F
- Wind used
- 30 km/h
How it is calculated
- Joint NWS and Environment Canada formula (2001), with T in °C and V in km/h:
- WC = 13.12 + 0.6215 T − 11.37 V^0.16 + 0.3965 T V^0.16.
- Valid only when T ≤ 10 °C and V ≥ 4.8 km/h. Outside this range, no result is given.
Example
−10 °C with a 30 km/h wind: wind chill of −19.5 °C (−3.1 °F).
Good to know
- Wind is measured 10 m above the ground: near the ground it is often weaker.
- Sun, humidity and clothing are not taken into account.
- Below about −27 °C wind chill, exposed skin can freeze in under 30 minutes.
Sources
- NWS (NOAA), Wind Chill Chart (2001)
- Environment and Climate Change Canada, wind chill index (JAG/TI 2001)
Frequently asked questions
What is this tool used for?
In cold weather, wind takes heat away from the body faster. Type the air temperature and the wind speed: you get the wind chill.
How is the result calculated?
Joint NWS and Environment Canada formula (2001), with T in °C and V in km/h:
What should I check before using the result?
Wind is measured 10 m above the ground: near the ground it is often weaker.