Introduction of Rainwater Solar Terms in Twenty-four Solar Terms

1. Rain is the second of the 24 solar terms. Fight with your fingers; The sun reaches longitude 330; February 18-20 of the Gregorian calendar every year. Rain, like solar terms such as Grain Rain, Xiaoman, light snow and heavy snow, is a solar term reflecting precipitation and ancient farming culture. Rainy solar terms mark the beginning of rainfall. As the saying goes, "Spring rain is as expensive as oil", and suitable precipitation is very important for the growth of crops. Entering the rain solar term, the northern part of China is still cloudy and cold, and it is still snowing in some places, with no breath of spring; Most places in the south are full of spring, with a scene of early spring.

2. Rainwater solar terms generally start from February 18 to 20th and end on March 4th or 5th of Gregorian calendar. The rainy season is changeable, which is one of the seasons with the most cold wave processes in the whole year, with cold and hot, warm and cold at first. In rainy and solar terms, the direct point of the sun is gradually approaching the equator from the southern hemisphere. At this time, the sunshine hours and intensity in the northern hemisphere are increasing, and the temperature is rising rapidly. Warm and humid air from the ocean becomes active, and gradually pushes northward to meet with cold air to form rainfall, but the rainfall level is mainly light rain or Mao Mao rain.