I general, beer should be stored in a cool place. In warmer climates this often means refrigeration and you get used to letting your beer warm a little before you drink it. Cooler climates often use cellars to store beer which works quite well. As long as temperatures are kept between 35F(2C) and 60F(15C) you're probably OK. Keep in mind that storing at the warmer end of this scale will increase any aging effects since any yeast remaining in the beer will be more active. This is a Good Thing if you're aging a barleywine but will cause lower gravity beers to go "stale" sooner.

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