From the owners manual-short version, check air psi after sitting at least 3 hrs or driven less than 1 mile.
Add /release psi to recommended cold psi. run them under and they wear unevenly and reduce fuel
economy,may fail from overheating. Run them over, ride is harsh, prone to damage, and wear uneven.
I myself bought a good tire gauge and check every time I wash the car and with a weather change.
With every 10 degrees weather change your tire psi will also change by one degree. Next to having
proper fluid levels tire psi should be at the top of the list of importance

 

I meant to say for every 10 degrees of weather change the tires will change by one pound of pressure.