Nope. But then again, I'm only an hour south!
Really good article on this subject here, http://www.adamsforums.com/topic/17083-faq-do-the-products-have-a-shelf-life/. Bottom line, the products all respond differently to temp swings, and storing in a temp controlled environment is preferred. I know it can get cold in MD, too. And since shelves can be cheap (cough, Harbor Freight, cough), I stand by my recommendation above. It's your money, though, so your call.