Yeah, but Orlando always seems to be Hot AND Humid. The only place I have lived that was worse for Hot AND Humid was Tampa.
We had low humidity last weekend with the highs in the low/mid 90s. We turned off the AC Thursday night and did not run it again until today because of the humidity. Looks like the AC is going to be running for the next week or so.
The other thing that makes Disney hotter is that you have so many people crammed into a very little area made up of concrete. The people add to the heat and humidity. At least at EPCOT you can get a breeze but at MK it can be like a sauna.
I live in a rural area but work in the "city." I commonly see a 5-10 degree temperature difference at my house vs work. If the temperature is very hot or very cold there will be a good 10 degree difference in the urban heat island. MK has always been a very hot and humid heat island to me maybe because I spent so many summers days there.

Later,
Dan