Why does it often rain when Hengdian Studios goes to May Day?

As the temperature rises, the atmospheric humidity increases, which is affected by seasonal storms, and the water vapor is constantly evaporating and rising, which is easy to form clouds and cause rainfall. At the same time, the May Day period is also the peak of national tourism. A large number of tourists flood into various places, and human activities will also have a certain impact on the weather, which may affect the stability of the weather and lead to rainfall. From the end of April to the beginning of May, this period is in the transition from spring to summer. Climate change is relatively large, the weather is unstable, and the intersection of north and south air quality also makes rain increase at this time.