What is the date of the Great Cold in 2023?

The severe cold in 2023 is1October 20th, 65438+ 16:29:20, and the 29th Friday of the twelfth lunar month.

The Great Cold is the last of the 24 solar terms, and it is called "Great Cold" every year when the sun reaches 300 degrees on June 20-2 1 day of the Gregorian calendar. This gas festival is the coldest period of the year during March 9 and April 9, when cold waves frequently go south. There is a folk saying that "a slight cold is the most important thing, and it is cold without wind." Great cold refers to extremely cold weather.

Because China has a vast territory and a large span between the north and the south, the climate between the north and the south is quite different. According to China's long-term meteorological records, there is no slight cold in the great cold solar terms in the northern region; But for most parts of the south, April and September are the coldest, so the big cold solar terms are colder than the small ones. Slight cold and severe cold are the periods with the least rainfall in a year. During the annual cold solar term, the rainfall in South China is only 5 to 10 mm. ..

Severe cold weather change

During the severe cold solar term, the atmospheric circulation is relatively stable, and the adjustment period of circulation is about 20 days. When this circulation is adjusted, there will often be a wide range of rain and snow weather and strong winds to cool down. When the west of 80 degrees east longitude is a long wave ridge and East Asia is a coastal trough, under the influence of the northwest wind and the constantly supplemented cold air, China will have a sustained low temperature.

Great cold and slight cold are solar terms indicating the cold weather. According to the statistics of perennial climate data in China, the coldest period of a year in northern China is 65438+ 10 in mid-June (June 1 1 -20). The annual slight cold solar term starts from 65438+1October 5-7, one solar term is about 15 days, and the middle section is just within the slight cold solar term; The severe cold solar term generally starts from 65438+1October 20th -2 1, and the end of June 65438+1on Gregorian calendar happens to be the coldest time in some parts of the south.