We had 2 ball pythons in a hot car with the windows down for a 4 hour drive (ran into traffic). It wasn't that bad and they were fine. We had a thermometer in the car with us and the temps in the shady parts of the car were around 101. (Actually the mice we bought at the show died on the way home due to the heat). We gave the snakes some water when we got home and left them alone. They were fine.