I live in Fla also. Definitely no heat right now and depends on how much sun he is gonna get. If he is not getting much I would still use the uvb light. Also, our screen patios in the summer are like ovens as you know. Be careful leaving your chameleon outside all day, especially if you are not going to be home. I have found it to be too hot in the summer months especially with the hottest months coming up. I notice they will gape at times, cause they were too hot. The screen rooms are probably hotter than actually being outside in the shade. Use a temp gun and check out the temps.