I can handle pretty much any temperature as long as it's dry....after all, I can sit in a sauna quite happily for an hour (although it's not recommended).
The humidity makes me irritable. You're always wet. You never feel clean. Your skin feels prickly. You feel the sweat dripping down your back and down your butt...urgh. And to top it all off I have sciatica/piriformis type pain in the lower back which humid weather seems to aggravate.
Shoes....sweet sweet shoes....I have not worn a pair since, quite literally, May.
Hot weather clothing is so boring. You're options are greatly reduced. Hmm, shall I wear the green t-shirt or the brown one. The plaid shorts or the denim shorts.