This thread is hilarious.
I think weather is in some ways a proxy for location. And if you claim that the location of your desired B-school education plays no part in your decision, then you're kidding yourself.
How many folks here have been to New Hampshire in the dead of winter? Or Chicago? ((raises my hand)) All right then - for those of you who haven't, let me tell you - it sucks. Badly. Chicago is my favorite large city, and the only one I'd ever live in, but winter STILL makes it seriously blow for four or five months of the year.
Obviously, if you get into an M7 school, it'd be hard to to turn it down. Good for you. For the other 98% of us here, location (i.e. weather) should play a part. Going to Darden, Duke, UNC or UCLA would be far superior, in my judgment, to a Ross or Yale for much of the year, especially since those precious summer months will be spent at your internship, not at school.
I applied to Haas over Kellogg solely on the basis of its location. Sorry, Evanston is an awesome city, but I wouldn't be surprised to see Eskimos living there come January.