I can attest to how much worse it is with humidity. I was in kuwait for about 8 months at the time, and then there was some freak weather change and the air came from off the gulf. When that humidity hit, I was dying. The dry heat was somewhat tolerable, but once it got humid, the sweat quit evaporating and I was even more miserable. I'll take below zero with hurricane force winds any day over above 100 with slight humidity.