We can’t stress it enough, nothing ruins wine faster than the extreme heat or cold. Nobody likes boiled wine, and that’s what you get if your wine is left in your hot car. What’s worse than boiled wine? Frozen Wine! Extreme temperatures will pop the cork and turn your wine into frozen slush. So when you are purchasing your wine in dead winter or in the heat of summer, beware of the outside temps and get your wine bottles inside and store them in a dark, cool place!