See this answer posted by Bob Pursley a day or so ago.
https://www.jiskha.com/questions/1798529/Please-help-me-I-dont-understand-The-pressure-in-a-car-is-35psi-on-a-winter
The pressure in a car tire is 35psi on a winter day when the temperature is 0 degrees Celsius. What is the pressure in the same car tire, assuming the volume of the tire has not changed, on a summer day when the temperature is 30 degrees Celsius? (Use gay-lussac’s law)
2 answers
You are not answering the question-Stop giving those calculations. Why can’t you guys give a simple straightforward answer. If the temperature outside is 70F at 35 psi, when the temperature drops to 30F it is ok to at 1 to 2 psi and when the temperature raises back to 70F check your tires pressure again and adjust to 35 psi. It that simple.