How Tire Pressure Changes with Temperature

The Science Behind Tire Pressure Fluctuations

Tire pressure can change for a number of reasons. Typically, we see air pressure change in our tires during summer and winter. Every 10-degree change in weather can deliver a shift of 1 PSI, sometimes closer to 2. When temps go below zero, drivers can expect their air pressure to deflate significantly. In the summer, when temps rise, the air inside the tires will expand, leading to an increase in pressure.

Changes in altitude can also affect tire pressure. In high-altitude areas, the pressure around the tire decreases. This causes the internal pressure in your tire to read higher than it is. Your TPMS may alert you that your tires are overinflated, but that's just a reaction to the change in altitude. You can deflate your tires if you are having this issue, but when you return to normal altitude levels, your tire may be too deflated for safe driving.

Why PSI Drops in Winter and Increases in Summer

Your tires lose air pressure in colder temperatures. When your tires deflate because of cold weather, they increase rolling resistance and sidewall flex, which causes more friction. This tire friction leads to engine strain and energy loss, draining the engine of power and reducing efficiency. The engine works harder, which leads to a modest decline in fuel efficiency. That's why managing your tire pressure is key for improved performance and fuel economy.

How to Maintain Proper Tire Inflation Year-Round

Tire pressure maintenance has plenty of benefits: maintaining a high fuel economy, improving tread life, and reducing risk of a blowout. Keeping an eye on your tire pressure year-round takes some proactive steps to make sure your tires are performing at their best.

Routinely checking your tire pressure is key to avoiding tire pressure issues and can help you adjust your pressure for maximum performance. We recommend you check your tire pressure once a month. This is because your tires naturally lose air pressure each month, from 1–2 PSI every 30 days.

Always check your tire pressure when those fall chills come in or summer starts to heat up. Large shifts in overnight temperatures at the beginning of the season can sway your tire pressure.

Another time to check your tire pressure is when you are going on a road trip. Make sure your tires are ready for hundreds or even thousands of miles to reduce your risk of tire failure.

You should also buy your own pressure gauge to keep an eye on your tires at home. Digital gauges are the most accurate, while the classic pencil gauge can be difficult to get an accurate reading on. Otherwise, going to the gas station and filling up your tires works as well.

Recommended PSI Ranges for Cars, Trucks, and SUVs

Every vehicle has its own PSI range for best performance and tire life. You should review your vehicle's manual or check the driver's doorjamb to find the appropriate PSI for your tires. Here are typical ranges for tires on cars, SUVs, and trucks.