As a kid, my parents took us to WDW a couple of times in the middle of August (first 2 times I went there actually). I was 8 the first time and 12 the second time. DH and I are also teachers, and DS3 is in nursery school too. DS-8-months (14 mos. when we go) is the only one without this issue right now.
I remember it being very hot in August. I also remember going into the air-conditioned shops and loving that. I can't remember if or when we took breaks to go back to the room because I was so mesmerized by being at WDW that those are the memories I have...so the good news is that now that I am 30, I only have great memories of being there in August as a child! And I never had any bad heat/humidity memories years ago either. We are going this July with our 2 sons. Here are some things we are doing:
-Keeping a slow pace and while we want to see as much as we can, we will make sure everyone is happy and not miserable by being forced into any attractions while hot/tired/cranky (including DH and myself!).
-Eating light throughout the day...cereal in the morning in the room (except for 2 mornings of character breakfasts); lighter CS lunch (maybe a grilled chicken salad) at whichever park we are touring; TS dinner in air-conditioning (biggest meal will be dinner, after touring park & not in the middle of the heat).
-Breaking after lunch to return to the room and relax in the AC. Both DS's will probably fall asleep in the car on the way back to the POP and we will carry them into the room and let them nap.
-Shower in the afternoon some time before dinner, daily.
-Dinner at 6 either at a park or a resort TS restaurant.
-Character meals with different characters at each one (4 character meals total) so that my kids can see all their favorites without having to wait in a long hot crowded line in the parks.
-Possibly the nighttime SpectroMagic parade at MK if I feel my kids can handle it...if not we will go to it next time around when they are a little older.
-Not try to see everything everyday...be more realistic that we will not get to do everything, BUT we will have lots of fun no matter what! We'll be at Disney after all!!!!!
-Fastpasses whenever we can
-Morning EMH whenever we can, except for the Studios...we are doing an 8 AM breakfast with Playhouse Disney characters anyway and will get into the park early, so we are going there the day after the EMH hoping it will maybe be less crowded
-Air-conditioned attractions!
-Indoor CS restaurants for lunchtime whenever possible. Could use the break in the cooler temperature!
-Driving to the parks so that if kids fall asleep on the ride back to the room it will be easier in the car than carrying a hot tired sleeping cranky child, baby and a double stroller! I know the car will be hot when we get into it but I would rather not wait for the bus.
Bonnie