Calculate
Wind Chill
Temperature
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To calculate the apparent wind chill temperature, please
enter a number in both Wind and Temperature fields, then
click outside the text box. Pressing the tab key to move
between entries also works. The following wind chill
calculation requires the temperature to be given in
Fahrenheit. Convert from Celcius to Fahrenheit if necessary.
Wind Speed (mph):
Temperature(F):
Apparent Temp(F):
Temperature Conversion (Celcius to
Fahrenheit)
Enter a number in either field, then click outside the text
box.
C:
F:
Wind Chill Factor Table
Actual
Temp(F degrees) Wind (miles per hour)
calm 5 10 15 20 25 30 35 40
50 48 40 36 32 30 28 27 26
40 37 28 22 18 16 13 11 10
30 27 16 9 4 0 -2 -4 -6
20 16 4 -5 -10 -15 -18 -20 -21
10 6 -9 -18 -25 -29 -33 -35 -37
0 -5 -21 -36 -39 -44 -48 -49 -53
-10 -15 -33 -45 -53 -59 -63 -67 -69
-20 -26 -46 -58 -67 -74 -79 -82 -85
-30 -36 -58 -72 -82 -87 -94 -98 -102
Explanation
The wind-chill temperature is a measure of relative
discomfort due to combined cold and wind. It was developed
by Siple and Passel (1941) and is based on physiological
studies of the rate of heat loss for various combinations of
ambient temperature and wind speed. The wind-chill
temperature equals the actual air temperature when the wind
speed is 4 mph or less. At higher wind speeds, the
wind-chill temperature is lower than the air temperature and
measures the increased cold stress and discomfort associated
with wind.
The effects of wind-chill depend strongly on the amount
of clothing and other protection worn as well as on age,
health, and body characteristics. Wind-chill temperatures
near or below 0 F indicate that there is a risk of frostbite
or other injury to exposed flesh. The risk of hypothermia
from being inadequately clothed also depends on the
wind-chill temperature.