In other words... as hot as here. But at least during our "off-season" we don't have to shovel or scrape anything.

Several of my bikes are stored in non-air-conditioned conditions, but completely out of the sun, and I've noticed no notable change in tire or tube durability. If however a fully inflated bike or wheel is left in direct sunlight in our desert climate, I could see how intense radiative heating could cause a problem (having just loaded my bikes in the back of my pickup truck shell for tonight's 12 Hours of Sun City ride, and hoping the short time they're out there won't affect them much).