Why does it rain?

There are two necessary conditions for rain: 1, and material conditions-water vapor and tuberculosis.

2. Dynamic conditions-updraft.

When the water on the ground evaporates and rises under the radiation of the sun, the higher it is, the colder it is, and the water vapor condenses around the dust (condensation nucleus). With the increase of height, the lower the temperature, the more water vapor condenses, from cloud droplets to water droplets, and the water droplets become bigger and bigger. Finally, they break away from the top of the updraft and fall down to form rain.

Why does it rain? It's all caused by the sun

Because the sun, the water on the ground and in the ocean evaporated, and the air was full of water vapor;

Because the sun makes the heat difference between different latitudes and between land and sea, it leads to the movement of airflow, and then the airflow rises under various conditions, bringing water vapor to the high altitude and condensing into clouds and rain.