I parked my car on campus 2 days ago during a blizzard and it ran fine, when I went to drive it today it won't shift into park. Is it because of the cold? Or is it something mechanical? I'm currently really short on money, so it would be a huge relief if it is a cheap fix. Thanks!

 

Into or out of park? The title and the post say two different.
Were you parked on a hill?