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Calculating Wind Chill Factor(WCF) or Wind Chill Index(WCI) in Python
  • Difficulty Level : Basic
  • Last Updated : 07 Feb, 2018

Wind-chill or Windchill is the perceived decrease in air temperature felt by the body on exposed skin due to the flow of air. The effect of wind chill is to increase the rate of heat loss and reduce any warmer objects to the ambient temperature more quickly.

Here is the standard formula that was adopted in 2001 by Canada, UK, and the US to compute and analyze the Wind Chill Index:

Twc(WCI) = 13.12 + 0.6215Ta – 11.37v+0.16 + 0.3965Tav+0.16

Twc = Wind Chill Index (Based on Celsius temperature scale)
Ta = Air Temperature (in degree Celsius)
v = Wind Speed (in miles per hour)


Air Temperature = 28
Wind Speed = 80
Output: 30
Calculation done using the above formula:
WCI = 13.12 + 0.6215 * (28) - 
      11.37 * (80)**0.16 + 
      0.3965 * 28 * 80**0.16
Air Temperature = 42
Wind Speed = 150
Output: 51
Calculation done using the above formula:
WCI = 13.12 + 0.6215 * (42) - 
      11.37 * (150)**0.16 + 
      0.3965 * 42 * 150**0.16

# Python program to calculate WCI
import math
# funtion to calculate WCI
def WC(temp, wi_sp):
    # Calculating Wind Chill Index (Twc)
    wci = 13.12+0.6215*temp- 11.37*math.pow(wi_sp, 0.16) + \
          0.3965*temp*math.pow(wi_sp, 0.16)
    return wci
# Taking the Air Temperature (Ta) 
temp = 42
# Taking the Wind Speed (v) 
wi_sp = 150
print("The Wind Chill Index is", int(round(WC(temp, wi_sp))))


The Wind Chill Index is 51

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