That solar term is called arable weather.

The solar term of rain is the beginning of spring. When spring returns to the earth, the temperature rises and the precipitation increases, which provides the necessary conditions for the growth of crops. In the rainy season, farmers' friends began to get busy, plowing, sowing and fertilizing, laying the foundation for a bumper harvest. At this time, the rain moistens everything and is conducive to the germination and growth of crops, which is a critical period for crop growth.

Rainwater solar terms are called "climate of cultivated land".