Is it low pressure or high pressure in rainy days?

Low air pressure is the air pressure near the ground. The air flow with low air pressure rises upward, and the higher the air flow rises, the lower the temperature, which is easy to form rainfall. Low air pressure can generally bring strong winds and rainfall to the passing area. Areas with high ground pressure are often sunny, and areas with low ground pressure are often rainy. Generally high pressure and low pressure are relative, not the absolute value of atmospheric pressure.

Remember that atmospheric pressure is related to temperature. The higher the temperature, the greater the pressure. In fact, the factors that affect density are not only temperature, but also the content of different gases in the air. The density of water vapor is smaller than that of air, and the water vapor content is high in rainy days, so the air pressure is low.

Low pressure weather

Air pressure is closely related to the weather. Generally speaking, areas with high ground pressure are often sunny, and areas with low ground pressure are often rainy. The high pressure and low pressure mentioned here are relative, not the absolute value of atmospheric pressure.

The air pressure in a certain area is higher than the surrounding air pressure, which is called high pressure area; The air pressure in a certain area is lower than the surrounding air pressure, which is called low pressure area. On the same horizontal plane, if the air pressure distribution is uneven, the air will flow from the high pressure area to the low pressure area. Therefore, the air pressure in a certain area is high, and the air in this area flows out in the horizontal direction.

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