The more snow you get in the winter, the better developers you have in that area. That's the lesson I learned from the pattern in which universities were in the top 10 for the ACM programming contest every year. If you're stuck inside from tons of snow, good time to code.
Hmm, maybe that's why there's lots of tech companies here in Phoenix. We have an inversion of that. It's great to be outside in the wintery months but now, during the summer, when it's 110+ by day and even 95-100 at night, you tend to stay inside.