What are the temperatures at which MiniDV tapes can be stored?

I accidentally left some miniDV tapes in my car overnight and the temperature (outdoors) was around or below freezing. I don’t believe that the tapes froze, but what are the safe temperatures for storing MiniDV? Could they have been harmed?

heat and magnetic forces will harm your tapes more than the cold. so long as they were not damp then frozen, they will be fine