The beginning of winter means that vitality begins to stagnate, everything enters a state of recuperation and storage, the temperature drops, and winter begins.

The Beginning of Winter is the nineteenth of the twenty-four solar terms and the beginning of winter. The bucket handle points to the northwest, and the sun’s longitude reaches 225°. It intersects between November 7 and 8 of the Gregorian calendar every year. , Li, is the beginning of construction; winter is the end, and everything is collected. The beginning of winter means that vitality begins to accumulate, and everything enters a state of recuperation and storage. The climate also transitions from dry and dry autumn to rainy and cold winter.

The commonly used methods for dividing seasons mainly include the "solar terms method" and the "temperature method". Traditionally in China, the "beginning of winter" of the "twenty-four solar terms" is used as the beginning of winter; the "solar terms method" divides Winter means that all things are in a state of recuperation and storage. The "temperature method" divides the season when the daily average temperature drops steadily below 10℃ for five consecutive days as the beginning of winter. The winter divided by the temperature method means that the weather is cold.

Meteorological changes

In the beginning of winter, the sun has reached 225 degrees of ecliptic longitude, the sunshine time will continue to shorten, the height of the sun at noon will continue to decrease, and the northern hemisphere will receive less and less solar radiation. However, because the heat stored on the surface in the second half of the year still has a certain amount of energy at this time, and because there is still "accumulated heat" on the surface, early winter is usually not very cold, and the real coldness occurs after the winter solstice.

Due to the large span between the north and the south of China, the climate is very different between the north and the south. This climatic significance of winter is obviously late for some areas in China. After the beginning of winter, the climate changes from less rainy and dry in autumn to rainy and cold. winter climate transition.