With all due respect to the OP, airing tires has been discussed numerous times. Air the tires when cold, i.e., before rolling. Ambient temp is not taken into consideration as it constantly changes. Tire mfgrs. have taken that in consideration in their inflation tables.
If you normally air to the max psi indicated on the tires, do so. The tires will naturally heat up in use. I use a temp gun and look for an anomaly. If three tires are, say, 120 degrees, and one tire is 160, that indicates a problem that should be investigated.