Why is it that the more stars you see on a summer night, the hotter the weather will be tomorrow?

At night, the number of stars is closely related to the sky conditions at that time. When there are clouds in the sky, because the stars will be covered by clouds; At the same time, starlight will be reflected and absorbed by water droplets, so from the ground, there are few stars and the luminosity is very weak. If there are no clouds in the sky and there is less water vapor in the air, there will be many stars from the ground. In summer, when this area is controlled by the subtropical high pressure system, because the air sinks from high altitude to low altitude, during the sinking process, the air pressure gradually increases, the volume is compressed, the temperature gradually increases, the air relative humidity gradually decreases, and the air layer becomes relatively dry, resulting in cloudless weather. Especially after nightfall, the solar radiation heat source is interrupted, the ground temperature drops rapidly, the evaporation of water vapor is weakened, the temperature in the lower layer drops, and the gas layer becomes more dry and stable. People will see more stars in the cloudless night sky. Controlled by subtropical high, the air is dry and stable, and the general weather changes little. Therefore, it is correct to judge that the weather will not change much in the future by the characteristics of many stars at night, which indicates that the weather will continue to be fine the next day. But "the more stars" does not necessarily mean "the hotter tomorrow", because there are many thermal factors, and the situation varies from place to place, so it cannot be generalized.