We just went through this last year. We sold our house & moved into a temporary place for a few months. I put all my fabric in plastic totes and stored it in my sister's basement until we moved to a permanent residence. The fabric spent 3 months in my sister's basement. I didn't want to take a chance with putting it in the storage unit because of the hot temps, it was summer. All was fine, but sis does have a de-humidifier in her basement.