You will not want to leave it in the hot car for long, as I've noticed significant accuracy changes in some models between when the sensor itself is hot or cold. I'm not talking about just +/- 5 degrees, but 40F or more depending on the differential between the sensor and object being measured. Ofcourse these are just my personal observations from using some cheap $20-$40 USD IR thermometers, not high end calibrated laboratory grade devices.
KuoH
KuoH
I will try to borrow my friends temperature gun, but i will probably forget it