Why does my tire pressure go up when driving?
As temperature levels change, so does the air pressure in your tires. It's the same as when you drive at higher speeds for an extended period: the tire warms, and the air within expands and increases pressure.
Is recommended tire pressure hot or cold?
Tire manufacturers suggest checking tires when they're cold for the most accurate reading. Outside temperatures can cause tire pressure to vary by as much as 1 psi per 10 degrees; higher temperatures mean higher psi readings.
How much does tire psi go up after driving?
The inflation pressure in tires generally drops by 1 to 2 psi for every 10 degrees the temperature lowers. Also, when you drive your car, and the tires warm up, the pressure in the tires will increase one psi during each five-minute interval in the first 15 to 20 minutes you drive.
What should tire pressure be in cold weather?