Went last week of August 3x. 2x had an extended WDW vacation due to a Hurricane Delay (MCO was closed). It is hot. But hot is great for swimming if you like to swim. Best to do parks early. Swim in the middle of the day. Go back to parks at night. Water parks are great this time of year too. Disney Quest helps on rainy days. It does rain a little every day. Does not ruin the trip, just be prepared with ponchos. We have found the crowds lighter at this time compared to earlier in the Summer. Probably because many schools are back in session. Not our favorite time to go, but never had an awful trip. If it was the only time we could travel I would go in August without a problem.