I guess you have to imagine being strapped down in a small cockpit with the windows closed and heat pouring in through the firewall (off the engine) while wearing a helmet.
Yes, being strapped in a hot car in the hot sun would make things worse. At least we have a nice sea breeze, the temps are high and the humidity is high but as long as there a slight breeze it's quite tolerable. I love it!!
I lived in Cheyenne Wy, for 3 years....THOUGH I WAS GONNA DIE!!! I made a promise to myself to never live up North. If it gets below 80 degrees I'm not comfortable.