Jeff- It was definitely hot but not really humid. We really felt the heat while we waited on the curb for the day parade in the MK, but other than that it was ok since we were constantly in and out of the attractions/shops. The lines weren't too bad- the longest we waited was 40 minutes and that was for Splash Mountain. We were able to walk on to a lot of the attractions, and it seemed like later in the day was the shortest wait- no matter what park we were in. FastPass helped cut out some of the lines, but we waited 30 minutes for Test Track and the line was moving at the same speed as the stand-by line!