Welome to HW and an early welcome to Florida!! I live in the Tampa area, and was diagnosed a little over a year ago. Pretty much the same areas you suffer with, plus my feet and ankles. Yes, when the storms roll in and the pressure systems change, it can make for some achy days, but it seems everyone on the forum suffers from that no matter where they live. We took a trip last fall to Wisconsin, and I can tell you that the cold there bothered me way more than anything I've ever experienced in Florida.
When are you moving here, and to what part of the state?
Wow you really are going to have a change in climate! We love Cirtus County..it'a a little quieter there, we have a few favorite getaway spots there. Yes, August will be very, very hot..July and August are typically the hottest months here, doesn't start cooling down until late September or October. We moved here in August as well, but that was over 20 years ago, when our kids were all small. I hope you like it!