RE: storing
I hang mine from the rafters in my garage, the charger leads reach up there, the kids/wife/car don't crush them when they're hanging up and I can get to them quickly. I (try to) fly all year round, especially during the winter months when the weather (apart from rain) is pretty benign, so don't actually store them, so to speak, as this implies laying them up during an off-season. East Anglia in the UK has a daytime temperature range of -2 to +30 celcius (winter through summer) so, in my club, as long as the flying conditions are appropriate we'll fly...
just googled your annual averages, you're a few degrees high than my neck of the woods and a few degrees lower in winter, little snow apparently so you should be flying all year round, right?
Regards,
Andy