I've gone the first and/or second weeks of May for the past three years, and each and every year it was hot. One year it never got below 92. YIKES! It sure was hot, but I wouldn't hesitate to go again. The crowd level was much lower than you'll find in the summer, and that awful humidity hasn't come in yet. The weather sites may say it averages in the low 80's, but that's factoring in the temps at 2 a.m.