Another one here for last week, at Pop Century as well. We were in building 4.
I kept looking at the weather on DirectTV all week before. 92-95 didn't sound too bad. We have a thermometer in the car that is pretty accurate. Sunday, Monday, and Tuesday it was 100-102.
Humidity is almost non-existent in Florida compared to what I am use to. It was really humid in the early mornings, but that burned off by the time buses were running. I was up roaming the resort at 6 am with my camera with the heavy morning humidity and it definitely left by 8-9 am.
The OP later in a post mentioned the sweat dripping down the back. Yup, that's what it was like. We looked like we just came out of the pool with our clothes on. It wasn't too bad for me, it's 115 at work in the summers with 96-98% humidity (steam molding plant) so I'm use to it, but my wife couldn't handle it too well at all.
Speaking of the pools, WOW, they are HOT as well. I think I got burnt more from the water temperature than the sun, LOL.
Also speaking of work, you folks at Pop Century.... Did you see the big foam
Lego blocks outside of the transportation area at the resort? They are actually Gorilla Blocks (Lego is a trademark name, but I used it for simplicity of describing them...) Well, I drove 1100 miles on vacation to get away from work and what is the first thing I see when I arrive to Pop Century? I see WORK!!!
These are the blocks. I made the materials for these blocks. Me and the 1 guy I work with are the only ones who make this material.....
I do not understand the people that don't FP Splash Mountain.

We got on with a FP in less than 3 minutes and the standby line was a very hot and boring 60-70 minutes!
It was our first trip (only trip probably) and without fast pass, we wouldn't have done anything. We arrived at the parks shortly after opening and left at noon. Back to the parks at 5 pm for dinner and roamed the parks from about 6 until 8 pm in the evenings. My oldest daughter LOVED!!! Splash Mountain, so we rode it 3 times on Monday and twice on Friday. Rode ThunderMountain twice on Monday and once on Friday. Soaring we rode twice on Wednesday and Test Track once, all with Fast Passes. We never waited at all. The time it took us to walk through the line straight to the loading section is the time we waited. Walk faster and we could have gone on sooner.
The shortest we saw for standby was 60 minutes, average was 75 minutes, and the longest on Friday was 120 minutes for these 4 rides mentioned above. We walked right on for 9 times in a total of probably 18 hours in the parks for those 3 days (Epcot we spent the whole day because it rained and cooled down considerably.)
Epcot was by far our favorite park and we stayed all day. The others we left at noon and went back for a couple hours in the evening. Magic Kingdom was completely different than we expected. We expected a huge park with open spaces much like Epcot is and was surprised at how narrow everything is. With the crowds in the afternoon, it was just miserable trying to get through the park to leave.
As for fireworks, I've read for 6 months at how fantastic the fireworks are. I'm guessing that most of you folks don't have a very good local fireworks show on the 4th of July because we were not impressed at all. Sure it was neat seeing the fireworks with the lighted up castle, but the actual fireworks were just...

. My local small town fireworks they spend a lot of money on and Zambelli Fireworks does the show (probably the best fireworks company in the US) and Magic Kingdom's fireworks was just so-so.