Whether for good (breeze on a hot day) or bad (wind chill in winter) moving air always feels colder than still air. Why is that?
In: Physics
Cool air removes heat from your body. As that happens, the air surrounding your body warms – reducing the temperature difference between the air and your body, which in turn slows down the rate of heat transfer between your body and the air.
A wind removes this layer of warmed air and replaces it with cooler ambient air, which has a larger temperature difference with your body, which increases the rate of heat transfer between your body and the air, which you feel as “cold”.
The opposite can happen when the ambient air temperature is higher than your body temperature. In this case, the wind will feel hot.
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