It is 90 degrees here in Nassau county and the humidity is somewhere near 90%. My car is white, as you can see above and the rear windows are covered. Take my word for it (I could only post a limited number of pictures), it was around 80 in the car with the AC on. I parked the car and put this thermometer on the dash. This reading was at 1:51 today, 10 minutes after I got out of the car.
This little black beauty has been sitting in the lot all day. Windows are up and as you can see the temperature on the seat is maxed out at 120. Could be higher, don't know, didn't want to break my brand new thermometer. I know that I will have other uses for it and I don't want to cook it the first time that I play with it.