Quote:

Perhaps the winter air in other areas is more moist than here.



Duh ... The only place drier than where you are is at the poles !!!

Humidity is relative to temperature. That's why its called "relative humidity". The colder it is the more the moisture in the air is condensed. Subsequently, someone in the balmy regions of Chicago would see moisture condensate on cold metal when the garage temps were brought up. However, someone in the frigid north such as yourself wouldn't have this issue until about mid August.