The only thing making the temps bearable here in W. Michigan is the fact that the sun is out.
If it was overcast like it was the past week, I would be curled up in a corner right now.
It rarely gets very, very cold when it’s overcast. The coldest nights are crystal clear, something to do with radiational cooling. Clouds act as a blanket. (H2O is a more powerful greenhouse gas than CO2.)