Characteristics of rain solar terms: temperature rises and precipitation increases.

After the solar term in February of the solar calendar comes every year, the earth finally gets a breath from the chilly spring, the ice and snow gradually melt, and the air gradually becomes moist with the precipitation. It's a time when spring returns to the earth and it's full of vitality. So what are the characteristics of rainwater solar terms? Let the twenty-four solar terms introduce you.

Rainwater solar terms are 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 unpleasant rain pattering. 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 during this period was above 10 degrees Celsius, with peaches and plums in bud and cherry blossoms in full bloom. It has indeed entered the climate spring. Except for a few years, the frost period is drawing to a close. Grafting fruit trees and planting trees is the right time. After the dry winter in South China, there are many spring droughts all year round, 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 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 relatively cold; After the arrival of rain, people obviously feel that spring has returned to the earth, spring is blooming and spring is full, and people's breath is inspiring their 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 do a good job in seed selection, spring ploughing, fertilization and other spring ploughing and sowing preparations.

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 from cold in late winter to warm in early spring. In the southwest and south of China, except the south of Yunnan, most places in the southwest and south are still the scene of early spring: warm sunshine, wet and cold in the morning and evening, green fields and spring water heating.

In the south of 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, during the rainy solar term, the northwest and northeast regions of China have not yet stepped out of the winter category. 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, with snowfall as the main precipitation.