If your tires are inflated to the proper PSI, based on a verified weight of your coach, any increase in temperature is easily handled by the tire design. If your tires are underinflated they will usually get hotter than if properly inflated.
They sell an inexpensive ($20) laser temperature gun that can be used to check your tire temperature after a run.
Some people try to avoid getting their coach weighed and try to "guess" at what the correct tire pressure should be and then want to guess how hot their tire will get. Do it right and eliminate the guessing. Your coach will ride better, tires will last longer, and you will have the best braking and driving traction when properly inflated.