I think that if it hasn't spent a lot of time over 80 degrees you have
nothing to worry about.

I've stored bottles of Champagne in the fridge for more than two years
and they've been just fine (and I drink enough Champagne that I think
I'd notice if it's off). The idea that corks will dry out in a dry
fridge is a bit exaggerated-- after all, the humidity INSIDE the
bottle is 100% so the inside part of the cork is going to stay wet
enough.

To be clear, though, I think you are much better off storing wine
inside a refrigerator for even quite a long time rather than letting
it sit in a house that gets way too warm.

You're going to want to drink it cold anyway so why not store it in
the fridge?

Shaun Eli
www.BrainChampagne.com
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