Our experience of temperature is pretty subjective. Humidity, individual physiology, and even our mood can change our perception of hot and cold temperatures. It’s the same with wind chill: the temperature that we normally feel is not the true temperature. The air immediately surrounding the human body is warmed by body heat and stays around the body as a sort of “air cloak”. This insulating cushion of air actually keeps people warm. When the wind blows on you, the cushion of air is blown away, and you are exposed to the true temperature, which feels much colder. Wind chill only affects entities that produce heat.