11/14/2025
In cold weather, tire pressure drops because air contracts when it's cold; you should check your tires and add air as needed to meet the recommended cold tire pressure. To do this accurately, check your tires when they are cold, before driving for more than a mile, and inflate them to the manufacturer's specification found on the driver's side door jamb or in the owner's manual. If you need to add air and you're in the neighborhood - just swing by - glad to help out.
Why tire pressure decreases in the cold
* Air contracts: According to Boyle's Law, gas pressure is dependent on temperature. As the temperature drops, the air inside the tires becomes denser and the pressure decreases.
* TPMS light: This pressure drop is why the tire pressure monitoring system (TPMS) light may come on during colder months, even if the tires are not damaged.
How to check and adjust
*Find the recommended pressure: Locate the recommended cold tire pressure on the sticker inside the driver's door jamb, the glove box, or in the owner's manual. For most passenger cars, this is between 30-35 PSI, but always use the number for your specific vehicle.
*Check when tires are cold: For the most accurate reading, measure your tire pressure in the morning before driving, or after the car has been parked for at least three hours.
* Inflate to the correct pressure: Use a reliable tire pressure gauge to check the pressure and add air until you reach the manufacturer's recommended PSI.
* Adjust for seasonal changes: Be prepared to add air as temperatures drop. You may need to check and add air every few weeks, as a consistent drop in temperature will naturally lower pressure.
* Don't forget: Check your tires at least once a month, especially during colder periods
