Donaldson R F Wind Chill & Dew Point Calculator
Find out how cold the wind makes it feel, and the dew point that tells you how humid the air is.
Wind chill
Dew point
How these are calculated
Wind chill uses the North American wind chill index (US National Weather Service and Environment Canada): 13.12 + 0.6215T − 11.37V0.16 + 0.3965TV0.16, with T in °C and V in km/h. It is only defined for air temperatures up to 10°C (50°F) and wind above about 4.8 km/h (3 mph). The Met Office “feels like” temperature uses a different method, so numbers will not match exactly. It describes how quickly exposed skin loses heat; it does not change the actual air temperature.
The dew point is the temperature at which the air becomes saturated and dew forms. It uses the Magnus formula and is accurate to about 0.4°C for normal weather. A dew point under about 10°C feels dry, 10–16°C comfortable, 16–18°C slightly humid, 18–21°C humid and above 21°C oppressive — general guides only.