If the skin is cold, room temperature air feels warm. If the skin is warm, the same room temperature feels cool. Wind chill temperature is based on a combination of air temperature and wind speed. As air temperature decreases and wind speed increases, the air feels colder because the temperature difference between skin and air is maximized as any warmed air is quickly replaced by cold air. That larger temperature difference increases heat flow, and our sense of coldness.
Wind chill is calibrated to the human body's sense of coldness due to that effect.
Heat always flows from higher to lower temperature, so the temperature of human skin will not drop below that of the surrounding air, regardless of wind. So while a wind will reduce the time it takes for a warm object to cool down to air temperature, it can't result in a final temperature below that of the air itself. Make sure to include the above question in your e-mail. All rights reserved. Please, read our legal info before using this site.