Now, why'd you do a crazy thing like that? High humidity and about fifty times as many mosquitos as we've got up here in MN. Plus no real winter to kill off the six-legged bastards!
(Just kidding. Florida's not a bad place to live, and for a space junkie, the prospect of watching rocket launches is absolutely awesome!)
What origin said. There is considerably more light pollution in most of Florida than in most of Minnesota, and it's definitely more humid which magnifies the problem. That's the big upshot of cold winters -- the air gets really dry, which makes for much better stargazing. (Downside is hypothermia of course.) If you want stunning night views without the cold, your best bet is the desert -- preferably at high altitude, and far away from cities. It can still get cold at night, but not like a Minnesota January. Arizona and New Mexico are good bets for that.