I'm in the very early stages of planning a trip with a group of friends for next year. We are thinking about going in September (not during Labor Day weekend) since that tends to be a less crowded time and we're all adults with no kids so we can realistically go any time of year. My only concern with September is I keep seeing people talk about how hot it is. Pretty much every other time I've gone to Disney has been between late June and mid-July so I am used to the 90 to over 100 degree days with 100% humidity and thunderstorms at least every afternoon. How much worse is September heat-wise than June/July and if it really is that bad, is there another time of year with as low crowds with better weather that you would recommend?