When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
i always use the back floorboard. rear windows are tinted darker, and if your tall at all the front seats shade that area as well...temp wise though it probably varies very little, but that is where i use, it also prevents wandering eyes!
I keep a laptop in my car all the time in the Phoenix sun and have never had any problems. We checked the surface temp of my car the other day and it was 192!