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Why does the wind choose to chill me?
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Wind Chill
Input Data
Wind Speed (MPH)
Air Temperature (F)
Information A measure of the cooling effect of wind. Wind increases the rate at which a body loses heat, so the air on a windy day feels cooler than the temperature indicated by a thermometer. This heat loss can be calculated for various combinations of wind speed and air temperature and then converted to a wind chill equivalent temperature (or wind chill factor).

The formulae used to calculate the wind chill index are:

Old Wind Chill Index (Pre-November 2001) 91.4 - (0.474677 - 0.020425 * V + 0.303107 * sqrt(V)) * (91.4 - T)
New Wind Chill Index 35.74 + 0.6215T - 35.75(V0.16) + 0.4275T(V0.16)
    where: V = wind speed (mph) and T = temperature (°F)
Results
Wind Chill
Index (Old)
°F
Wind Chill
Index (New)
°F
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