Yesterday afternoon it was 114.5* (46*C) - and I wondered if would be hot enough to cook an egg inside the car. So we did a bit of experimenting. The idea came from an Arizona woman who cooked an entire meal in her car.
The thermometer inside the car registerd about 141* (61* C) when I stopped watching it climb. Then, I cracked the egg in a glass dish and left it on the dash (inside the car.)
Then we walked sweated down the street to watch something much more exciting than frying eggs in the car. The men were fixin' a water-line break.
Sadly to report, after 2 hours in the car (from 3-5pm), the egg didn't cook. However, my engineer husband and I have debated over what we could do differently next time to maximize the heat. Stay tuned. The heat doesn't leave the desert until mid-October.