When was your first cold?

The first cold refers to the beginning of the winter solstice, and generally enters the first cold stage from February 7th to 8th in the solar calendar1every year.

It is the 23rd solar term among the twenty-four solar terms. Every year, the solar calendar is around 1.5, and the sun reaches 285 degrees of the yellow meridian.

First cold.

Related information:

The exact time of slight cold this year is 5th 19: 09. At this time, the national temperature is at its lowest period. The so-called "slight cold" is compared with the last solar term "great cold" "Cold" means cold, which means that it has entered the cold season of the year. At this time, cold air has accumulated for a long time, but it has not reached the coldest degree, so it is called slight cold. In fact, from the historical meteorological records, slight cold is colder than great cold, and it is the coldest solar term in the whole year.

There is often a saying of "Sanjiu cold", and this "Sanjiu" is just within the slight cold solar terms. "Sanjiu" is mostly 1.9 to 17, which is also within the slight cold solar terms. But this is just a general rule. In a few years, a bad cold may be colder than a mild one. People still remember the winter of 1975, and the lowest temperature solar term was actually heavy snow! Winter in the south of China is very warm. The middle of winter is 1 month, with frost and snow attacking and often freezing. The lowest temperature is about-10℃.

The lowest temperature in northern South China is rarely below MINUS 5℃, and the low temperature below 0℃ in southern South China is even rarer. The coldest area in the middle of winter in China is the north of Heilongjiang, and the lowest temperature is around MINUS 40℃. It's freezing, dripping into ice. The low-altitude valley is the warmest place in the middle of winter in most parts of southern China. The average temperature in 65438+ 10 is around 12℃, and only a few teenagers may have a low temperature below 0℃.

In addition, the inversion effect is very significant, so tropical fruits such as bananas and mangoes can grow well. The lowest temperature in winter in south China is not low, which is beneficial to non-spring production and is also suitable for developing diversified economy. Citrus, which was ordered not to move, was born in the south of China. Generally, it is required that the minimum temperature should not be lower than MINUS 5℃ and the annual temperature should be higher than 15℃, which can be met in most parts of South China and almost all subtropical plants. Only in this way, the unique climatic conditions should be a very important factor.

Slight cold is the 23rd of the 24 solar terms in a year. During the slight cold, the sun moves to the longitude of 285 degrees, which is about 65438+1October 6 (65438+1October 5-7) in Gregorian calendar. After the slight cold, the climate in China began to enter the coldest period of the year. As the saying goes, cold air has been cold for a long time. At this time, the weather is cold, and the great cold is not extreme, so it is called slight cold. Climate observation data show that the solar terms range from "slight cold" to "great cold", and the temperature in most parts of China is the lowest.