Is the air pressure low or high when it rains?

Rainy days are low pressure.

Low pressure refers to the air pressure near the ground, which usually forms on land in summer. The famous low pressure centers are the Asian Low Pressure Center (India Low Pressure) and the Azores Low Pressure Center. Low pressure airflow rises upward. The higher the airflow rises, the lower the temperature becomes, so rainfall occurs. Therefore, low pressure generally brings strong winds and rainfall to the areas it passes through. Can alleviate drought.

The weather controlled by the high-pressure system is sunny, because the high air pressure near the ground means that in the vertical direction, the air mainly moves vertically downward. The closer it moves to the ground, the higher the temperature. The more difficult it is for water vapor in the air to cool and condense to form precipitation. So the weather is sunny. Like our usual autumn weather, the cool weather is often caused by high-pressure system control.

Extended information:

The impact of low air pressure on the human body mainly has two aspects:

1. The pressure effect caused by too low pressure;

2. Hypoxic effect caused by reduced atmospheric oxygen partial pressure. The latter has more important physiological and clinical significance.

The impact of hypobaric hypoxia on the body

Plateau hypobaric hypoxia can have a series of extensive and specific effects on the body's functions and metabolism, at all levels and levels. Performance. The extent and results of its impact, in addition to being related to altitude, also depend on factors such as the speed of entering the plateau, the length of stay, and the functional metabolic state of the body.

Reference: Baidu Encyclopedia_Low Pressure Environmental Exposure