I do just fine in Florida in July with no A/C. To be honest with you, I'm a fat guy with sweats a lot anyway and I find a bikini top (to keep the sun off you) with no doors and no top does just fine in the heat. Even at 10-15MPH (stop and go traffic), the breeze helps.
Now, where it's bad is my S10 where there is top and doors and even with the windows down there's not a lot of air flow...
Denis A. Baldwin
1991 YJ 99 Vortec 5.7L, SM465, NP205, 14 Bolt Rear, Dana 60 Front, 5.13 Gears, Detroit Lockers, 395/85R20 46" Michelin XML tires on 20" XD Wheels, Cherokee Offset Springs (10" front to back stretch total), Bilstein 5150s, 1in. BL, custom cage, Warn M8000, Double D Dash/OHC, 4Low Front Stinger Bumper, DirtWorx Rear Bumper WTC, Tube Fenders, Comp Cut, 1 Ton HD Kingpin High Steering and PAID FOR.