Will it rain at the vernal equinox? Is it good or bad to rain in the spring equinox and solar terms?

After the vernal equinox, the temperature will be basically stable, but it may be accompanied by weather changes, in which windy is more common. So, will it rain at the spring equinox? Is it good or bad to rain in the spring equinox and solar terms?

Will it rain at the vernal equinox?

During the spring equinox, cold air constantly invades the south of China, and there will be low temperature weather in spring. At this time, the continuous rainy days will have a great impact on crops. If the average temperature is lower than 10 ~ 12℃ for more than 5-7 days, it may cause serious rice seedling rot.

Because rice and cotton are both thermophilic crops, when the temperature is above 10 ~ 12 and the minimum temperature in sunny days is above 5℃, it is beneficial to all seedlings. Conversely, if there is low temperature and rainy weather, you can imagine.

First frost is the product of cold wave and strong cold air in spring. In the case of warmer climate, cold waves are relatively rare, but we should not be careless.

There are two rainfall concentration periods in South China, one is the first flood season from April to June, and the other is the second flood season formed by typhoon rainfall from July to September. The first flood season begins in early April and reaches its peak in mid-May, with an average of 20 rainstorms per year, with the most in June, accounting for more than half of the total rainstorms. It lasts for a long time and the rain is fierce. Because the "vernal equinox" only touches the beginning of the flood season, I won't go into details here.

Weather characteristics of vernal equinox and solar terms

During the vernal equinox, most of northwest China, northern North China and northeast China are still in the transitional stage of winter and spring, with many sunny days and windy days, and it is warm and cold at first sight. According to the statistics of weather in this area in recent years, April is the most, followed by March. The vernal equinox is 15 days, that is, from the end of March to the beginning of April. In these areas, dust blown by strong winds and floating dust at high altitude, especially the air pollution caused by dust storms, have always been concerned by everyone and become a hot topic for some time.

What are the solar terms after the vernal equinox?

Behind the vernal equinox is Qingming.

Twenty-four solar terms: beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, beginning of autumn, Chushu, Bailu, Autumn Equinox, Cold Dew, Chufrost, beginning of winter, light snow, heavy snow, winter solstice, slight cold and severe cold.

The historical origin of the twenty-four solar terms;

As early as the Eastern Zhou Dynasty, the Spring and Autumn Period and the Warring States Period, our people had the concepts of south to Japan and north to Japan. Subsequently, people divided the year into 24 equal parts according to the natural phenomena such as the running position of the sun and the moon at the beginning and middle of the month, the weather and the growth of animals and plants. And give each equal part a proper noun, that is, twenty-four solar terms. By the end of the Warring States Period, solar terms had eight names: beginning of spring, Equinox, Long Summer, Summer Solstice, beginning of autumn, Equinox, beginning of winter and Winter Solstice. These eight solar terms are the most important of the 24 solar terms. Mark the seasonal changes and clearly divide the four seasons of the year.

By the Qin and Han Dynasties, the 24 solar terms had been completely established.

The book Huai Nan Zi has exactly the same name as the modern twenty-four solar terms.

In BC 104, the taichu calendar written by Deng Ping officially set 24 solar terms in the calendar, and defined the astronomical position of the 24 solar terms.

In ancient times, solar terms were called "qi", and there were two qi in each month: the former was called "solar terms" and the latter was called "neutral qi". The monthly distribution of the 24 solar terms is shown in the following table, which is closely related to the arrangement of the lunar leap month. In the lunar calendar, beginning of spring is the first of the 24 solar terms. The names of the 24 solar terms are named according to the place pointed by Dougang and the natural climate and landscape at that time. The so-called fighting means that the three stars of the Big Dipper, Kuixing, Xingxing and Yuxing, point to different directions and positions with the movement of celestial bodies, and the positions they refer to are the months they represent. For example, the first month is cloudy, dusk refers to cloudy, midnight refers to cloudy, and daytime refers to cloudy. February is the base, base refers to dusk base, base refers to midnight base, base refers to daytime base, and so on in other months.