Why does the inside of an automobile get warm after hours of sitting in direct sunlight?
The sun's heat gets trapped in the interior of a car. Also depending on what color the interior is, it may get hotter or cooler.
Instruments which are used to measure temperature and Humidity should be kept inside "stevenson screen". Its a wooden box to shade from direct sunlight, Its painted white to reflect sunlight, It has vents to allow free flow of air. The stevenson screen should be located away from trees and buildings which could affect the temperature!
Nothing stops you from storing a camera in the automobile, but there are risks associated with the same. Some one can steal the automobile and you loose your camera too. Leaving this factor aside, if you are parking your car in open and under sunlight for long time it can also result in a damaged electronics (including memory devices for digital camera) and batteries in the camera. With all windows closed on a sunny day…