I'm thinking about moving to San Francisco from Norway. How is living there?

[ha]

it is expensive, worse than oslo. but it's worth it, and pay is higher.
it's not hot all year, but it's not cold either. it never snows. in the winter it can rain a lot.
san fran never gets hot, really. and in the summer it can get into the teens and twenties (celsius).
there's tons to do, it's a great city, very active, very exciting, very creative.

check out craigslist for housing rentals.