I bottled a AJC batch of hard cider May 6th, 2013, and it was just an experiment in hard cider. I don't remember much about brewing it, so I can't really give any specifics, but when I bottled it I wasn't expecting much. About week ago, I opened a bottle that had been in the fridge for 5 or 6 days just to see if it was worth drinking or not. It was worth drinking, and I wanted to have another. I didn't, as there are only 4 or 5 bottles left. I had another batch of cider going at the same time, only made from fresh apples I had juiced. I can hardly wait to open one for Thanksgiving.
EDIT: Although there is no hard data on long term storage at "high" temps or swinging temps, if possible, keep them away from light as well. I put mine in the hall/coat closet. Dark, cool, as fairly stable temps too.