I went to school for awhile in Sacramento, California's Great Central Valley, which is considerably hotter than I was used to nearer the coast. I don't think I got used to it much. I am perfectly happy with it in the low 60s or even high 50s. T shirt and shorts weather. 70 - 80 is OK if it is dry. 85-90 is getting too hot even if dry. 90/90 is not human habitable in my opinion! Which is has been nearly everyday here in Florida.....