and I would say go either early June or mid to late August. If I had to pick, I'd pick June. We like the first week of June because across the country many kids are still in school so it's not that crazy-mad-crowded. It's early enough that the big Brazilian groups aren't there yet - they come later in the month and in July. And, if you go early enough in June, you can still catch the tail-end of the International Flower & Garden Festival. We actually like to go Memorial week the very best so we usually overlap the end of May with the first few days of June. However, we did go the third week in June once.
August - well - by mid-August most kids are back in school. Now, we've gone in August and it's been unbearable hot - like over 100 degrees at times. And, we've gone in August and it was bearable. But, it's definitely hotter than June.
Another thing to keep in mind is the rate seasons - I'm not sure what they are but you should do some research and see if one time frame is cheaper than the next. Disney has value, regular and peek and holiday seasons. I'm thinking that early June and late August are both regular season, but I'm not sure.
Either way - have fun - we think summer at WDW is fantastic despite the heat.
But, we're from NC and it's pretty hot here too.
PamNC