system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does wind chill work?

I live in Florida, where it rarely goes below 70 degrees Fahrenheit. That being said, looking at the weather across the country, I realize that I have no idea how wind chill works. Weather forecasts have reported a temperature of 3 degrees, but with the windchill it feels like -17 degrees, or more recently in Chicago, the temperature was -11 degrees but -40 with the wind chill.

In Florida, I've experienced hurricane force winds, but that has never given us drastic changes in temperature, so this concept of the wind making it feel sometimes 30 degrees colder baffles me.
gpt
The effect is partially due to evaporation of water. When water evaporates it takes heat with it. When the wind is blowing, cold dry air displaces the warmer moist air around you/the thermometer facilitating a faster rate of evaporation.

Wind chill is normally measured by a wet bulb thermometer.

Source: A distant memory of primary school.