From Forbes.com: When winter strikes, home searches rise....... And the colder it gets, the better warm looks. For every 10-degree temperature drop that occurs where a house hunter resides, Trulia saw a 4.4% increase in searches for homes in warm regions, which is bigger than the increase in searches overall.....searches for homes in warm vacation destinations increase more than twice as much as home searches overall.

You can read this article here and find out which cities get the biggest search boost when winter weather strikes.