Mine will overheat in temps over 90F. After it cools down it works OK again. It's important to use the iPad without a case to allow maximize cooling. I will often fly from inside my car on hot days with the motor and air conditioning running, preventing the overheating issue. You can also get a
12V ice chest and use
gel ice packs on the back of the iPad, but that's a real hassle. I had to do that in Arizona one time when it was over 100F, while flying Superstition Mountain (nice flight if you get a chance).