Is there cold air going south in 202 1 September?

With the arrival of beginning of autumn, many people must find it colder this year than before. In previous years, the temperature in the southern region was still above 30 degrees, and this year it was really six or seven degrees lower. It is precisely because of this that whether there is cold air going south in September has become a very concerned issue. Let's have a look.

Is there cold air going south in 202 1 September? It depends, mainly on the region.

Whether there is cold air going south in September, there is no unified answer, mainly depending on the region. However, in the middle and late September last year, the cold air going south was mainly concentrated in the north of the Yangtze River and rarely crossed the Yangtze River to the south. Meteorological data show that in the past 10 years, only the south of the Yangtze River officially entered autumn in late September, and the rest of the time had to wait until the first ten days of 10. This year, Jiangnan officially entered autumn one week ahead of schedule, which is related to the path of cold air going south. Because the earth's rotation will be biased, the cold air from the polar regions will also expand eastward in the process of going south. When cold air enters China, it usually passes through Inner Mongolia and then affects North China. Therefore, the autumn in late September refers to North China. When cold air passes through North China, the energy exchange is completed, and the temperature of cold air mass rises, which is not enough to affect Jiangnan.

Is it cold in September? Because it is cold early this year, it will definitely be cold in September, especially in the north. The end time of the hottest dog days is August 20th, the beginning of autumn solar term of 202 1 is August 7th, and the summer solar term is August 23rd, which means that the hot weather after August 7th is "autumn tiger". The "Autumn Tiger" of 202 1 is expected to end in late August. Therefore, the weather will not be too hot in September, and the continuous high temperature weather will decrease, and the weather will gradually turn cold and enter the autumn climate.

What is the temperature in September? What's the average temperature in China in September? 16℃ ~ 26℃, it is recommended to wear cool and breathable clothes such as cotton and linen shirts, thin long skirts and thin T-shirts during the day. It is recommended to wear suits, coats, jackets, jackets, thin sweaters and other warm clothes at night. But because there is a big difference between north and south, it depends on your area, mainly on real-time weather forecast.