That's about the time I went last year, as well as several other years before that. I won't lie, it's brutal at times. I was so overheated on our first day that I almost croaked in the ABC Commissary in MGM. And that was after entering the park, walking to get FastPasses for LMAX, and then getting in line for the Backstage Tour!

Yup, that little amount almost killed me. I was not dehydrated or anything; I'd been drinking a lot of water, eating normally, sleeping normally (at that point anyway, heh). It was just so hot, I felt like I was going to pass out. Heart and head pounded, everything started to spin, I couldn't breathe... yeah, not pleasant!

The 2nd day wasn't much better at Magic Kingdom, and that was even after we decided to go there late (we're talking 3:00pm late) to avoid some of the heat.

After the 2nd day though, I got used to it and didn't really have a problem after that.
I'd highly advise you to invest in one of those spraying water bottles with a fan, if you haven't already. We bought one back in 1998 or so, and it was the greatest investment we ever made! Pop 2 AAs in it, fill it with as much ice as you can and a little cold water before you leave your hotel room, and you're good to go. It really helps a lot. And always remember: the shops and shows are your friends! Country Bears, Tiki Room, American Adventure, etc. may not sound all that great to you (I personally love them all though

), but go anyway! You can't put a price on air conditioning, LOL.