Way back when, I remember Grandpa had a giant, Admiral deep freeze chest in the sunroom of his house. No heat in the winter, but enclosed. Never a problem. When they tore the house down a neighbor wanted the freezer, that was 1980. I think it's still in his basement.
When I was feeding horses,i used a chest freezer to store my horse feed,unplugged.
kept the mice out,plus the elevenseventeen wild cats that moved in helped.
butt,the cats were eating to many wild critters besides mice.