I live around Chicago and we get fairly big temperature swings over the winter. I keep all my planes in the garage (attached). I have my batteries in the planes and they are set to charge for one hour a day with a timer and the wall wort chargers.

I put after run oil in all the engines, but I am worried about the temperature fluctuations and the monokote. I'd rather not bring them inside, but if I have to I will.

Any thoughts here...And please don't tell me to move somewhere warmer, I know that one already

Paul