University of Illinois at Urbana-Champaign
Office for Mathematics, Science, and Technology Education
College of Education @ University of Illinois

Wind Chill Factor

A phenomenon called the Wind Chill factor makes us feel colder in winter than the air temperature really is. This is due to the interaction of air temperature and wind on the human body, which is already giving off heat. Both temperature and wind cause heat loss from body surfaces. A combination of cold and wind makes a body feel colder than the actual temperature.

You may hear it mentioned quite often on the news during the winter months. How do news weather persons know that when there is a 10mph wind with a temperature of 5 degrees F that the real temperature we feel is -10 degrees F?

There is a specific formula that can be used to calculate wind chill.

Wind chill calculator

Use this calculator to determine the actual wind chill given the air temperature and wind speed.

Temperature scale:
Wind speed units:

Credits & Contact

  • Original simulation by James P. Dildine, 1999 (1999)
  • Modified to use current wind chill formula by Eli Byrd (2018)
  • Send comments to MSTE Webmaster

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