You are going to sweat ...
I have tried a variety of gear in Florida and with our heat and humidity, there is nothing that will keep you cool when you have to stop in traffic and the heat coming off of the pavement is over 90 degrees. When it hits 100 it is HOT.. As long as I'm moving there really doesnt seem to be a difference in most summer gear. Under All Armor type t-shirts seem to help, but it is still hot except when moving. Sweat washes off, road rash don't! so I just sweat.
12 K1600 GTL
02 K1200 LT (gone but not forgotten)