I'll be in the garage as long as it's above 0 C (freezing), but the way the winters have taken a turn for the worse the last years I really haven't been able to work there at all in winter.
We had three months of continuous sub zero temperatures last winter and so far this one seems even worse. Since my garage has no insulation I'm in the process of converting a room in the basement into a small shop just to get SOME metalwork done...
I really, really, REALLY hate the cold and the snow, but my better half doesn't want to move to California or Spain, so we've compromised on Copenhagen, Denmark... They have snow too, but at any given day they're about 5-10 C / 10-20 F warmer than us, and that helps a little