Originally Posted by bill_de
This is just a guess, but I would think the temp inside the car varies quite a bit in different area. This would be more so on a sunny day. If you place a few thermometers around the Jeep you might find it would be impractical.
That would be especially true in regards to the rear seat and cargo areas where you don't have the same vent coverage as the front.
However, there's no reason the couldn't mount a temperature sensor in the dome light housing to at least give an approximate overall measurement.
Having said that, set the controls to what is comfortable and don't worry about the numbers.
Honeywell did a study at one point where they found people ran their home heat higher and AC lower when they set it to an actual temperature as opposed to using a range dial that ran from low to high. With the latter, most people tended to run the heat and AC less due to setting it according to how the temperature felt rather than what it actually was.