I'm in Sarasota, about 50 miles south of Tampa. I've got my bench in the garage. It's not too bad in the mornings or evenings, but can be brutal during the day. I have big box fan that helps somewhat when it gets real hot, but I still tend to avoid modeling in the middle of the day.
I occasionally will move into the kitchen table when I'm doing stuff like detail painting, decaling or working on ship rigging (plus my wife doesn't think I'm being as antisocial as when I spend hours out in the garage).
A moisture trap for your airbrush is also a good investment (I found out the hard way when the clear coat on a Blue Angel F/A-18 turned a foggy white). While a moisture trap might helps during high heat/high humidity conditions, there are days during the rainy season that I don't even try to do any painting.
When I moved here twenty-four years ago there were about a half dozen hobby shops, a couple of train shops and one that was exclusively wooden ship models. All but one train shop are gone now (unless you count the few models that Michael's arts & crafts stocks). The train shop has a good selection of paints, glues, etc., but most of my purchases these days come online from Squadron, Sprue Bros. or Model Expo.
We also used to have a fairly active local IPMS chapter, but that folded about five years ago when several of the core members literally died off. The younger members didn't the interest in continuing the club.
Mark