Yes, in cold weather, you usually need to inflate your tires. Low temperatures also indicate low tire pressure, and low tire pressure may mean unsafe driving. That's because, with any 10°F drop in temperature, tires lose 1-2 pounds per square inch (PSI). So your tires might potentially lose 4 PSI over the weekend if the temperature falls by 20 ° F. It can lower the lifespan of the tires and increase braking time, resulting in dangerous situations.