# Calculating Wind Chill Factor(WCF) or Wind Chill Index(WCI) in Python

• Difficulty Level : Basic
• Last Updated : 04 May, 2022

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

Examples:

```Input:
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```
```Input:
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```

## Python3

 `# Python program to calculate WCI``import` `math` `# function 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))))`

Output:

`The Wind Chill Index is 51`