Is it stressful in sunny days or rainy days?

The air pressure is high on sunny days.

The change of atmospheric pressure is related to the weather. At different times, the atmospheric pressure in the same place is not exactly the same. We know that the density of water vapor is less than that of air. When there is more water vapor in the air, the air density will become smaller and the atmospheric pressure will also decrease. Generally speaking, the air pressure in rainy days is smaller than that in sunny days, and it is found that the sudden drop of air pressure in sunny days is a precursor to rain; However, after several days of continuous rain, it is found that the air pressure has become larger, and it can be expected that it will clear up soon. In addition, the change of atmospheric pressure is also related to temperature. Because the air density decreases when the temperature increases, the atmospheric pressure is smaller when the temperature is high than when the temperature is low.

Extended data:

Atmospheric pressure is not fixed. In order to compare atmospheric pressure, at the 10th International Metrology Conference in 1954, scientists stipulated a "standard" for atmospheric pressure: at the sea level of latitude 45 and the temperature of 0℃, the pressure generated by a mercury column with a height of 760mm is called the standard atmospheric pressure. Since it is a "standard", we should pay attention to the accuracy of each physical quantity according to the formula of liquid pressure. According to relevant data, the density of mercury at 0℃ is13.595×10.3 kg/m? The g value of sea level at latitude 45 is 9.80672 N/kg. Therefore, it can be concluded that the pressure generated by a 760mm high mercury column is:

P mercury = ρ mercury GH =13.595×10.3 kg/m? ×9.80672N/kg×0.76m = 1.0 1325× 10 5pa。

This is the value of 1 standard atmospheric pressure.

Baidu encyclopedia-standard atmospheric pressure