I do, but not intentionally. This summer has been a hot one, and the AC has been used alot. I've noticed on the days where I don't turn the AC on my temps will climb faster. The AC keeps the temps down a few degrees, and since I'm currently using dimmers, it helps alot.

I don't have a problem with humidity, I use tubs and they keep humidity extremely well. If anything, my humidity is a little high most of the time.