What day is April 20th?

April 20th is Grain Rain, the sixth of the 24 solar terms. The arrival of solar terms in Grain Rain means that the cold wave weather basically ends and the temperature rises rapidly, which is very beneficial to the growth of cereal crops. Grain Rain is the best time to sow seedlings and plant melons and beans, and there are various folk customs and activities.

In Grain Rain season, obvious rain often begins to appear in southern China, especially in southern China. Once cold air meets warm and humid air, it will often form a long rainy day. Qinhuai River is a transitional zone between spring rain in the south and spring drought in the north. From the Qinling-Huaihe River to the north, the spring rain decreased sharply. In the northern region, Grain Rain is a symbol of the "final frost".

Meteorological changes in Grain Rain

The main feature of the weather in Grain Rain is rainy. After the solar term in Grain Rain, the rainfall increases and the humidity in the air gradually increases, which is beneficial to the growth of crops. After entering the Grain Rain solar term, the precipitation in the middle and lower reaches of the Yangtze River and the south of the Yangtze River increased obviously, especially in South China. Once cold air meets warm and humid air, it will often form rainy weather for a long time.

The Huaihe River Basin in Qinling Mountains is basically the dividing line between the spring rain in the south of the Yangtze River and the spring drought in the north. From the Qinling-Huaihe River to the north, the spring rain decreased sharply. In the north, Grain Rain is a symbol of the "final frost". There are few cases of large-scale invasion of cold air into the south, but the cold air activities affecting the north have not stopped, and early thunder will appear in many places.