tropical36 wrote:
Ambient temp. has nothing to do with cold psi ratings and the extra cushion I recommended, should take care of these changes along with other variables one will encounter.
True, but, let me state it slightly differently: Tire pressure is set at the current ambient temperature before driving the coach.
It is NOT based on a particular ambient temperature.
Example: We often drive from South Texas in the summer to Angel Fire, NM.
So it is 95+ degrees when we leave. Set PSI before we leave. BUT, when in the Angel Fire area (8,000'+) we often have to ADD AIR, as we often drive early in the morning when we stay there. The low in Angel Fire tonight is 28 degrees F:
https://www.wunderground.com/weather/us/nm/angel-fire