We have a lot of Snowbirds riding road bikes and trikes in Highlands County, which is in Central Florida, 85 miles south of Orlando. The 3 cities there, Avon Park, Sebring and Lake Placid, all have great paved roads for riding without much traffic once you get out of the city. It’s mostly farm country, orange groves and cattle ranches, lots of long, straight, flat roads.
There are a couple bike clubs that meet for group rides 5 days a week in Sebring and in Lake Placid. There’s also a nice State Park with a paved bike trail, and a dirt Jeep trail in the woods. It’s nice and shady in the park (called Highlands Hammock) so it stays cool even when the sunshine is heating up into the 80’s.
Check it out on Google Maps.