Wind chill (often popularly called the wind chill factor) is the felt air temperature on exposed skin due to wind. The wind chill temperature is never higher than the air temperature, and the windchill is undefined at the higher temps (above 10 °C [50 °F]). Humidity on the skin can result in a higher felt air temperature, which is accurately termed the heat index (or humidex), and is used instead.

Wind Chill is a 2007 horror film starring Emily Blunt and Ashton Holmes. George Clooney and Steven Soderbergh are among the producers of the project. The movie was directed by Gregory Jacobs, who previously directed the well-received movie Criminal. The film began filming in the Vancouver area on February 1, 2006. The completed film opened in limited distribution on April 27, 2007. The film is also available on DVD.