[VadeRetro]

Being cold has nothing to do with it.

Being exposed to cold for a long time is a big stress on your body. Stress degrades your immune system. Yes, viruses give you colds, but you get exposed to viruses all the time. Exposure to virus + weakened immune function = higher risk of cold.

I thought everyone knew that by now.

[Alberta's Child]

Exposure to virus + weakened immune function = higher risk of cold.

Bingo. In cold weather, your body uses more energy trying to keep warm than it usually does.

[Kirkwood]

Amazingly, some doctors don't know it. A lot of things lower our resistance to infections including stress, poor diet, lack of sleep, environmental changes, etc. Of course you do need the infectious agent to be present, so yes, you cannot get a cold from only being cold.

[Doctor Stochastic]

The low humidity that usually comes with cold temperatures can dry out your mucus membranes making you more susceptible to colds. Still, it helps to wash your hands and most of all: Avoid anyone with a cold.