I have a central unit for the main floor, but my sons room is in the attic. When it gets ~85 degrees outside, the attic is an uncomfortable temperature. Even with fans running, the main problem is his computer overheating. He runs gaming hardware (maxed out video cards, etc). I think I about have him talked into moving down here to the main floor with us for the summer
lol
I've looked at solutions, but its easy enough for him to take the guest room on the main floor for 6 or 7 weeks.
Anyway, I'm with you - it gets incredibly humid here in TN and I prefer to be outdoors. I'm usually on the laptop out on the back deck. But the extreme heat/humidity will keep me indoors during the heat of the summer. I'm dreading it.