Proper storage of your wines is imperative to their future enjoyment and at the point you start buying wines for more than just tonight's dinner, you should think about how best to store them. You'll need to make sure your investment is protected and that your wines are allowed to mature properly, or at least be preserved until you're ready to drink them. Temperature, light, vibration and humidity are primary considerations.
Temperature is vitally important with stability more important than how low it is.
Yet, short of having a temperature controlled space, variations in temperature are inevitable for most of our situations. It's important to keep these variations gradual, over weeks or months of time, not daily. Rapid fluctuation of temperature is fine wine's worst enemy. If you have a spot that varies by only five to eight degrees from winter to summer you should be in good shape. Try setting up storage in a basement where the surrounding ground temperature dictates a fairly stable interior temperature.