What are the climatic characteristics of rain solar terms? As rainfall increases, the temperature rises.

Rainwater solar term is characterized by rising temperature and increasing precipitation. In the Yellow River Valley, the birthplace of the 24 solar terms, the weather was cold before the rain, but there were snowflakes flying and the unpleasant rain dripped. After the rain, the temperature can generally rise above 0 degrees Celsius, with less snow and more rain. However, in the warm southern region, even in the dead of winter, rainfall is not uncommon.

In most parts of southern China, the average temperature in this period is above 10 degrees Celsius, peaches and plums are in bud, and cherries are in full bloom, which has indeed entered the climate spring. In addition to a few years, the frost period has come to an end. It is timely to graft fruit trees and plant trees. After a dry winter, there are many droughts in spring all year round in South China, especially in the western part of South China, where "spring rain is as expensive as oil". In addition, the invasion of cold wave will cause strong cooling and snowstorm, which will do great harm to the old, weak and young animals. These should pay special attention to prevention.

The arrival of the rain solar term not only indicates the beginning and increase of rainfall, but also indicates the rise of temperature. Before the rainy season, the weather was cold; After the arrival of rain, people obviously feel that spring has returned to the earth, warming bloom and full of spring. The breath of people inspires the body and mind. At this time, the cold and snowy period has passed in most parts of the country, and the rainfall is gradually increasing, which is conducive to the greening or growth of overwintering crops. At this time, agricultural production should pay close attention to the field management of overwintering crops and make preparations for spring ploughing and sowing, such as seed selection, spring ploughing and fertilization.

The atmospheric circulation in rainy season is in the adjustment stage, and the general trend of climate characteristics in all parts of the country is the transition from cold in late winter to warm in early spring. In southwest and south China, except southern Yunnan, most places in southwest and south China are still a scene of early spring: warm sunshine, wet and cold in the morning and evening, green fields and warm springs.

In South China, when it rains, it is already full of spring and flowers are in full bloom. In the middle and lower reaches of the Yellow River and North China, the confrontation between cold and warm air did not bring about a sudden drop in temperature and snowflakes flying, but the arrival of spring breeze and spring rain. At this time, the average temperature has no snowfall conditions, and wheat has entered the stage of turning green. At this time, the demand for water is high, and the rainfall at this time is the least in the whole year. As the saying goes, "Spring rain is as expensive as oil".

However, in the rainy solar terms, the northwest and northeast regions of China have not yet stepped out of the category of winter. Judging from the average temperature in February, the monthly average temperatures in Lanzhou, Xining, Urumqi and Shenyang are-1℃, -3.9℃, -9.7℃ and -6.9℃ respectively, which shows that these places have not got rid of the cold in winter, and the weather is still dominated by cold, and the precipitation is mainly snow.