We live in the central USA, where temps are often below freezing for several months a time. We have an attached garage which is insulated, so usually stays above freezing due to heat coming through the house walls, as well as off of cars as they cool down after being driven. This causes a lot of the snow and ice debris to melt in the garage. We do have floor drains which drain away the liquid moisture, but due to all of the melting snow/ice, the garage is often very humid, causing condensation on the garage door, exterior windows of the garage, as well as on the cold cars themselves at times.
We really enjoy the above-freezing garage temps to gradually melt the snow/ice, but don't like the high relative humidity in the garage. Does anyone have suggestions on what could be done to help reduce the humidity in the garage without a lot of cost or equipment? Putting a source of heat to raise the normal temp in there isn't really an option. I could put a residential dehumidifier in there, but I'm concerned that since the coils operate near to freezing temps already (which is what causes the water to condense on them and drain away), that the below 40 degree garage air will just cause them to freeze up with the condensed water before it can drain away.