You've probably heard "Don't go outside in the winter with your hair wet or without a coat; you'll catch a cold."

That's not exactly true. As with many things, the reality is more complicated. Here's the distinction: Being cold isn't why you get a cold. But it is true that cold weather makes it easier to catch respiratory viruses such as the cold and flu.

https://www.sciencealert.com/does-cold-weather-cause-colds-heres-why-you-really-get-sick-in-winter