Why does it only do this when its cold?

What is your question?

Hello everyone and thanks for your time. For a couple years now I've been having issues keeping my car running if its colder than say 30ish. If its down in the teens like it has been lately I have to keep it at around 2000rpm to keep it from dying. Holding my foot on the gas the whole time I drive even when I hit a light. Within bout 10 min of driving it runs great. All summer it runs great as well. I might add it always starts right up cold unhappy or not but when its cold it struggles to stay running. Any points I can go after? Hopefuly a cheap and easy fix but sometimes I'm not that lucky... Have a good one amd thanks again