What is wind chill?
Wind chill is the apparent temperature felt by exposed skin when wind accelerates heat loss from the body. Even if air temperature stays the same, stronger wind can make conditions feel significantly colder.
Because of this, weather safety decisions should consider both temperature and wind speed, especially for outdoor work, winter sports, and long exposure periods.
Practical guidance
Use wind chill to adjust clothing layers, glove quality, face protection, and exposure duration. As wind chill drops, frostbite risk on uncovered skin can increase rapidly in severe conditions.