Cold weather shouldnt throw a window off track. It might cause the weather stripping to behave differently (become more rigid) but I dont see how its going to affect the glass mounting points. Just pick up a shop manual and make sure you follow the procedure correctly. Not sure off the top of my head but Im pretty sure all it requires is removal of door panel loosen mounting bolts then adjust the guide bolts get it all nice and flush tighten and put all back together again.