Will be warm, but JerryWorld has a big A/C.
And you can see if for about 30 miles from every direction. Looks like a big blister on the Earth.
If you like speed, acceleration, and twisties, Six Flags has got some really good roller coasters. (I'm a 54 year old coaster junkie!) Just go mid-week to cut down on the crowds.
If you're the more slow, sedate kinda person (and ride a silver Connie
), there are many, many really nice museums in Fort Worth.