Is the atmospheric pressure higher or lower on a sunny day than on a cloudy day? why

The air pressure is higher on sunny days than on cloudy days.

Because low-pressure circulation will be formed in rainy weather, the wind changes obviously; In the situation of high pressure circulation, it is mostly sunny and the weather is relatively stable. Therefore, areas with high air pressure on the ground are often sunny, and areas with low air pressure on the ground 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 that in the surrounding area, which is called a high-pressure area; The air pressure in a certain area is lower than that in the surrounding area, which is called a low-pressure area.

Extended data

Besides weather, air pressure is also related to other factors:

1. The air pressure is related to altitude, atmospheric temperature, atmospheric density, etc., and generally decreases exponentially with altitude.

2. The air pressure varies daily and annually. In a year, the air pressure is higher in winter than in summer. In a day, the air pressure has a maximum value and a minimum value, which appear at 9 ~ 1 o'clock and 15 ~ 16 o'clock respectively, and a second-highest value and a second-lowest value, which appear at 21 ~ 22 o'clock and 3 ~ 4 o'clock respectively.

3. The change of air pressure is closely related to the quality of wind and weather, so it is an important meteorological factor.

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