Why is there much rain in summer?

There are four kinds of rain in summer: 1. When cold air from the north meets warm air from the south, it will form rainfall in a large cloud and rain area. 2. The warm and humid air near the ground rises sharply, forming thunderstorms under thunderstorm clouds. 3. Typhoon storm. 4. The warm and humid airflow is blocked by the hillside, and when it rises along the hillside, it condenses into topographic precipitation under the cloud. Among them, the confrontation between cold and warm air is the largest and the most frequent, accounting for almost 60% of the annual rainfall. Although the weather is very hot in summer and there is warm air from the south, the cold air from the north has not completely retreated in winter, and it is easy to form a confrontation with heavy rain. At the same time, the summer weather is hot, and the air is often top-heavy, unstable and easy to rise along the hillside, creating conditions for topographic precipitation. In addition, typhoons and lightning are also specialties in summer, which are rare in other seasons. So there is naturally more rain in summer than in other seasons.