I thought it was a weird set up too until my friend with small kids bought 4 door. Him and the wife can have the doors off and the kids are relatively contained. And he still has control of the windows if needed.If you are not familiar with a jeep many would not realize the power window button is in the middle of the dash. Dumbest setup I have seen.
But yes in the humid northern Virginia area I use AC. Even with the top down it is nice to have that cool breeze when you stop.