We went in Aug one year and the temp pegged at 116. It was VERY HOT, but it wasnt as bad to me as say 100 degrees and 70% humidity like in Washington, Orlando, Houston. I know you have heard this before, but its a dry heat. Walking along the strip is nice because you get blasted by the casino A/C. If you get too hot, just duck inside for a bit. Where I noticed it the most was at the corner near where Flamingo Hilton, Ballys, Cesars, and Excalibur are, they have the elevated walkways. It seemed like you were taking the escalators into a furness..