Yeah it's a big difference! My sister worked at the Interlochen Arts Camp in Michigan for a couple of summers and she said it was beautiful up there except the temperatures got down into the 40's at night in July. That's winter weather here! I've never been north of DC, so I don't think I've really experienced "real" winter, but I used to live in south Louisiana, so I sure know hot summers!
I'm studying economics and Chinese, but I have so many interests I wish I could have like 6 majors. Like I'm really interested in linguistics, and biology, and women's and gender studies, so I end up spending a lot of time researching stuff that has nothing to do with my major... But hey, college is for exploration right?