I'm not sure what you would consider warm weather. Ocala will see weeks with highs in the 50's and 60's between mid December and mid February most years. But there may be occasional cold spells with lows in the 20's and on very rare occasions in the teens. Some years will be warmer and some colder.
I live a little north of Ocala and we had one cold spell with temps down near 20 and a couple of others where the temps dipped into the upper 20's. Lot's of highs in the 50's and 60's until mid March this year.
Let me tell you a secret about the weather here, we get a lot more cloudy days than the tourist agency hints at. During the winter it is cloudy more often than not.
As for bike riding, there are a lot of cg in the Ocala National Forest, many of those places are served by a single state road (SR40) which is a good two lane road but not one I'd want to bike on. So keep thatin mind when you look at cg in that area. Secondary roads in the ONF are mainly dirt/sand roads except in the couple of towns on 40.
If you want to avoid freezes all together (most but not all the time) Then you'll have to be south of Orlando. And park prices go up the further south that you are and also with distance to a beach.
