Although it's not common, we can have substantial amounts of snow on the ground by late October. Last year, I kept my Evora out until mid-November, at which time it was too cold to wash it, and it went to bed dirty. This year, it (and the Z) was all nice and clean when it began its long winter sleep, and the Boxster is staying out and not getting detailed before storage. I can't wait to wash 3 cars when it's 20 degrees out and the hose is frozen. Unfortunately, it will be early May before all my snow is gone.That's really early - I store mine November 30th and bring it out by mid-March, unless there's still lots of snow on the ground.