After the solstice in winter, the weather began to get warmer.

The winter solstice solar term is an important solar term in life and the fourth solar term in winter. At this time, many places have entered winter, the temperature will be lower and the weather will be colder. After the winter solstice, it began to enter a few days. Generally, the temperature will be the lowest on the third and fourth days, the weather will be the coldest, and it will start to pick up on the fifth and ninth days.

September is the coldest day after the winter solstice.

39 and 49 are the coldest.

The coldest days are March 9 and April 9. In winter, the so-called "March 9 cold" is usually not too cold before the winter solstice. The real cold is after the solstice winter, especially "three or nine days" and "four or nine days".

During the winter solstice, the daytime is the shortest, the angle between direct sunlight and the ground is the smallest, and the sunshine intensity per unit area on the ground is the smallest. Therefore, the ground receives the least solar heat every day, and the daily heat budget deficit has not reached the maximum. On the solstice after winter, although the time of the day increases day by day, the growth rate is very slow. From winter to Sunday to "three or nine days", the average daily growth is only about 1 minute. At the same time, the angle between the direct sunlight angle and the ground increases very slowly. The daily heat budget of the ground is still in deficit, so the heat continues to be lost and the ground temperature continues to drop.

The total geothermal revenue and expenditure deficit reached its maximum only during the "March 9th and April 9th" periods. Because the temperature is mainly affected by the ground temperature, the temperature is the lowest during the "3949" period. In addition, the Siberian cold air mass also developed to a very strong stage before and after the March 9th Movement, and the frequent invasion of strong cold air was also one of the reasons for the low temperature.

The earth absorbs the heat from the sun during the day and releases it at night. In summer, more heat is absorbed during the day and less heat is emitted at night. In this way, you can accumulate some calories every day. In winter, less heat is absorbed during the day and more heat is released at night. Not only can it not be accumulated every day, but some heat accumulated in summer will also be consumed. During the winter solstice, less heat is absorbed during the day, but there is still some stored heat on the earth. After the winter solstice, less and less heat is stored. On March 9th and April 9th, the earth's heat storage is the least in a year, so it is the coldest.

After the solstice in winter, the weather began to get warmer.

The weather began to get warmer on May 9th.

After the Ninth Five-Year Plan, the weather will gradually pick up. /kloc-After 0/979, you can take off your thick clothes. After the Ninth Five-Year Plan, the weather will be completely warmer, which also represents the arrival of this spring.

The temperature is low on March 9 and April 9, but this cold weather won't last long. After May 9th, the weather improved. By May 9th, the climate will get warmer, and then it will transition from mild to warm spring weather.

On May 9th, the weather gradually warmed up, and the willows along the river began to sprout. On July 9, people will gradually take off their thick clothes. After 1999, the weather was completely warm, and they were going to prepare for spring ploughing.

The custom of winter solstice

Worship to Heaven and Ancestors: The winter solstice is one of the 24 solar terms in China, also called Winter Festival and Jiaodong. Since the Zhou Dynasty, both the ancient court and the folk held sacrificial activities to achieve national peace and family harmony. Later, people began to pay special attention to the winter solstice, and the saying that the winter solstice is like a year came from this.

Eating meat on the winter solstice: In ancient China, large families in the south had to sweep graves on the winter solstice. After sweeping the grave, they will give "meat" to relatives. In principle, according to the level of education. Families with high academic qualifications will get more "meat" as encouragement; And take special care of the elderly. If there are old people in the family, they will be allocated according to age. The older you get, the more meat you give.

On the solstice of winter, ancient China literati were particularly particular about the solstice of winter. After winter, solstice entered the ninth festival, and literati and other literati bureaucrats held activities to eliminate the ninth festival. The so-called small wine refers to nine people drinking with good friends, and there are nine dishes and nine bowls on the table. Because all nine cups are the same, and all nine cups are slightly cold.