Ours is deep in an insulated tandem garage. In the garage it does not seem to ever get below 32 degrees during our Wisconsin winters of late.
If I had no garage I think I would build a carport to keep the sun and rain off. I would worry mostly about solar
My previous Scamp
was stored outside for 15 years and it showed, though still it did not leak much. Windows
needed some sealing attention when I bought it at 11 years of age and that kept it nice and dry.