We are from the Midwest, so we do get days that can be very warm and humid, but when we went in August it kicked our butts. We tried to stay in, and drink lots, but it was horrid. The only bright side was that the lines were not to bad. We went in early June last year, while it was warm I don't think it was to bad. I have to agree with an above poster, its not the temp its the humidity. I have seen days around here where its only in the 80's, but we have 100% humidity........that is just torture.