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Environment Canada Wind Chill Chart

The document is a wind chill chart that shows the equivalent wind chill temperature based on actual air temperature and wind speed. It notes that wind chill does not affect objects or lower actual temperature, but describes how humans feel at a given temperature with wind. The risk of frostbite increases from low to high risk within shorter time periods the lower the equivalent wind chill temperature is.

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ALEX B
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383 views1 page

Environment Canada Wind Chill Chart

The document is a wind chill chart that shows the equivalent wind chill temperature based on actual air temperature and wind speed. It notes that wind chill does not affect objects or lower actual temperature, but describes how humans feel at a given temperature with wind. The risk of frostbite increases from low to high risk within shorter time periods the lower the equivalent wind chill temperature is.

Uploaded by

ALEX B
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Environment Canada Wind Chill Chart

Actual Air Temperature Tair (°C)


Wind
Speed 5 0 -5 -10 -15 -20 -25 -30 -35 -40 -45 -50
V10 m (km/h)
5 4 -2 -7 -13 -19 -24 -30 -36 -41 -47 -53 -58
10 3 -3 -9 -15 -21 -27 -33 -39 -45 -51 -57 -63
15 2 -4 -11 -17 -23 -29 -35 -41 -48 -54 -60 -66
20 1 -5 -12 -18 -24 -30 -37 -43 -49 -56 -62 -68
25 1 -6 -12 -19 -25 -32 -38 -44 -51 -57 -64 -70
30 0 -6 -13 -20 -26 -33 -39 -46 -52 -59 -65 -72
35 0 -7 -14 -20 -27 -33 -40 -47 -53 -60 -66 -73
40 -1 -7 -14 -21 -27 -34 -41 -48 -54 -61 -68 -74
45 -1 -8 -15 -21 -28 -35 -42 -48 -55 -62 -69 -75
50 -1 -8 -15 -22 -29 -35 -42 -49 -56 -63 -69 -76
55 -2 -8 -15 -22 -29 -36 -43 -50 -57 -63 -70 -77
60 -2 -9 -16 -23 -30 -36 -43 -50 -57 -64 -71 -78
65 -2 -9 -16 -23 -30 -37 -44 -51 -58 -65 -72 -79
70 -2 -9 -16 -23 -30 -37 -44 -51 -58 -65 -72 -80
75 -3 -10 -17 -24 -31 -38 -45 -52 -59 -66 -73 -80
80 -3 -10 -17 -24 -31 -38 -45 -52 -60 -67 -74 -81
where
Tair = Actual Air Temperature in °C
V10 m = Wind Speed at 10 metres in km/h (as reported in weather observations)

Notes:
1. For a given combination of temperature and wind speed, the wind chill index corresponds roughly to the
temperature that one would feel in a very light wind. For example, a temperature of -25°C and a wind speed of
20 km/h give a wind chill index of -37. This means that, with a wind of 20 km/h and a temperature of -25°C, one
would feel as if it were -37°C in a very light wind.
2. Wind chill does not affect objects and does not lower the actual temperature. It only describe how a human
being would feel in the wind at the ambient temperature.
3. The wind chill index does not take into account the effect of sunshine. Bright sunshine may reduce the effect
of wind chill (make it feel warmer) by 6 to 10 units.

Frostbite Guide
Low risk of frostbite for most people
Increasing risk of frostbite for most people within 30 minutes of exposure
High risk for most people in 5 to 10 minutes of exposure
High risk for most people in 2 to 5 minutes of exposure
High risk for most people in 2 minutes of exposure or less

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