Natural phenomena of rain solar terms

The main meaning of rain solar terms is to represent rainfall.

Generally speaking, when it comes to the rainy solar term, the rainfall will increase obviously, which is also the solar term with the most floods. Entering the rain solar term, the northern region is still cloudy and cold, and the temperature changes greatly; Most places in the south are full of spring, with a scene of early spring. Rain is the second of the 24 solar terms, and the time is one of February 18-20 in the solar calendar every year.

In ancient times, rainwater was divided into three stages: "One stage was that Rex sacrificed fish; Second, wait for Hongyan to come; Third-class grass sprouted. " Rain in the "July 9" period, the river broke the ice and the geese returned to the north. Folk customs related to rain mainly include "mending the sky and wearing it", "protecting the sky" and "bumping into worship and sending it away". As the saying goes, "Spring rain is as expensive as oil", so moderate rainfall is good for crops, conducive to their growth, and also a good embodiment of farming culture.

It rains at a fixed time. Generally, when the sun reaches 330 degrees of the yellow meridian, the direct point will slowly approach later, and the sunshine time in the northern hemisphere will gradually increase. In the ancient book "Twenty-four Solar Terms", rain was explained as follows: "In the first month, water fell from the sky, and beginning of spring belonged to wood. However, those who grow wood must have water, so it rained successfully in beginning of spring.

If the east wind melts, it will disperse into rain. "The temperature will also rise slowly, warm and humid air will become active, and cold air will also compete in the dark, so it is easy to form rain, which is why this solar term always rains. Of course, this is also the origin of the name of the rain solar term.