What season (month) does Grain Rain belong to? The origin of Grain Rain.

Grain Rain is one of the 24 solar terms and the last solar term in China in spring. Grain Rain refers to the increase in rainfall, which is very beneficial to the growth of cereal crops. Every April 20th or 2 1 day, when the sun reaches 30 degrees of the yellow meridian, it is Grain Rain.

Grain Rain means "Rain gives birth to hundreds of valleys", and it is Grain Rain when the sun reaches 30 on April 20th or 2 1 day every year.

In Grain Rain season, in the south of China, "a hundred flowers blossom", willows fall, cuckoos cry at night, peonies bloom and cherries are ripe. The natural scenery tells people that it is late spring. At this time, the temperature in the south rises rapidly. Generally, in late April, except for parts of northern and western South China, the average temperature has reached 20℃ to 22℃, which is more than 2℃ higher than that in mid-April. In the eastern part of South China, there is often a high temperature above 30 for a day or two, which makes people feel very hot. Low-altitude valley areas have also entered summer.

In ancient China, Grain Rain was divided into three stages: "The first stage was when Ping was born; The second time, the cuckoo blows feathers; The third class is Dai Ren's surrender. " After Grain Rain, rainfall increased, duckweed began to grow, then cuckoo began to remind people to sow, and then Dai Sheng birds began to be seen on mulberry trees.

During the Grain Rain solar term, the westerly jet in East Asia will weaken and move northward again, the warm and humid air mass in South China will become more active, the circulation fluctuation in the westerly belt from west to east will become more frequent, and the activities of low pressure and Jianghuai cyclone will gradually increase. Affected by it, there will be continuous rain or heavy wind and rain in the Jianghuai area.

Grain Rain is the last solar term in spring. At this time, just after planting seedlings and planting new crops in the field, rain is most needed, so there is a saying that "spring rain is as expensive as oil".