From what I've read in the past, Feb. weather in Florida is a toss up.
We went during the kids Feb. break (President's week) and we hade 80 degree and plus weather. It was wonderful! We were spoiled. But, we met a family who flew in 4 days prior to us, and their first day it was only in the 40's. So, like I said, I think it's a toss up.