How is the low tire pressure on rainy days?

In rainy days or before rain, the average molecular weight of air containing more water vapor decreases, that is, the air density decreases and the air pressure decreases. The following is the tire pressure introduction: 1. Function: Tire pressure strictly refers to the pressure of air inside the tire. In car maintenance, the engine is the heart of the car, and the damage of the engine will lead to the exhaustion of the life of the car, so the tire pressure is the blood pressure of the car, which plays a vital role in the performance and power of the car. 2. Signs: Tire pressure is a sign of the car's load capacity. Vehicle load depends on tire pressure. According to the relationship between tire load index and tire pressure and tire load capacity, the higher the tire pressure, the greater the load capacity; The smaller the air pressure, the smaller the load capacity.