In warmer weather (temperatures regularly above 45 °F / 7 °C) store snow tires away from heat, light, air, and moisture to protect them from rubber breakdown and dry rot.\
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Choose a cool, dry, preferably dark location to store your winter tires. First choice: a climate-controlled storage area. Second choice, a basement.\
Clean and dry each tire.\
Place each tire in a plastic garbage bag.\
Remove as much air as possible from each bag.\
Store each tire upright if space permits.\
Shield the tires from light: ensure that the storage area is kept dark, or place light-blocking materials on and around the tires.