To the OP -
It sounds like you will be in the Ocala area. I lived near Orlando for almost 20 years. Here is my .02 opinion:
In Orlando, I was always running my AC permanently NLT Easter. It would not be shut off till sometime in November. The humidity is always high in Florida, even during winter. From about 1 May till about November it was always over 90 degrees. The low will be 70-75. It can still be above 85 at midnight. It takes all night to get down to the low of 70-75 and then it starts going right back up again. The temperatures are pretty constant from day to day. I never experienced 100 degree temps and I would not expect that to happen. Just pretty much 93-97 for daily highs for about 6 months or so.
For some reason the Ocala area always seemed to be a little bit cooler (colder) then Orlando, especially during the winter months.
If you are heat sensitive, you will need to be very careful, especially when getting into a car that has been sitting outside in the sun. Even with running AC at the highest setting, it takes a while to cool down the inside. The AC needs to drop the temp of all that metal, plastic, and glass in addition to just cooling the air. I would not even turn on car AC for short trips - just rolled down the windows.
I always said that living in Florida is the exact reverse of living in the snow zone. Summer is the inside time in Florida. Winter is when many people like to go outside.
If you want to get away from the heat during the summer, I would suggest trying the states around the Great Lakes - Wisc, Mich, upper New York, also northern Minnesota. The Smoky Mountains and the Blue Ridge Trail areas will be a little cooler compared to Florida, but it won't be too cheap.