Ancient southern solar terms

There is no difference between rain and solar terms in the north and south.

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.

Rainwater solar terms mark the beginning of rainfall and the gradual increase 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, but it is still very cold before the spring; Most places in the south are full of spring, with a scene of early spring.

After the solar term rain, the direct point of the sun gradually approaches the equator from the southern hemisphere. At this time, the sunshine hours and intensity in the northern hemisphere increased, and the temperature rose rapidly. Warm and humid air from the ocean began to be active and gradually pushed northward, and the rainfall gradually increased, but the rainfall level was mainly light rain or Mao Mao rain.

In China climatology, beginning of spring is usually defined as the day when the daily average temperature is stable above 10℃ every five days.