I don't think the cold will hurt them either. I have several bows and a few of them I keep in my shed all winter and it doesn't seem to hurt them any. Now if it was an older wood bow I don't know for sure, I would check with someone that shoots traditional equipment. I also shoot in the winter (michigan winters) and it doesn't effect my bow any at all. It does effect me though.

The worst things for your bow are high tempratures (trunk or hatchback on hot day), direct sunlight and moisture. Like keeping one in a wet basement or something. I don't think it is very good for the strings.

Paul