Tires last longer when they are kept out of sunlight and away from big temperature swings. Ultraviolet light and ozone both degrade rubber, which is why a set left standing in a sunny garage can crack while barely being used.
We store your off-season set at the branch, labelled to your vehicle, and bring it out when you come in for the changeover. It saves the space at home and the tires come back in better condition than they would have done.