Here in Virginia Beach we have had humidity in the 60-80% range and heat advisories for a good portion of the past month. I must say I actually enjoy it. Im not exactly sure why, but I do.
Just drink every time you think about it, bring two bottles with you on every ride, and dont worry about the sweat. Look at all the lazy people speeding by you in their air conditioned cages, and pity them.
Plus once that cool fall air comes, we will all feel invincible.