There are many customs of 'number nine'. The 'Nine Nine Songs' is the most extensive and long-standing. These ballads make use of the phenological phenomena of nature to vividly reflect the law of weather change in the ninth middle school. Today is the first day of September 9, so do you think it's getting cold
Is it cold in September or September?
In the Yellow River, the Huaihe River and the Yangtze River, the "cold in September" is still very applicable. A lot of small partners in South China may have to raise objections. There is no comparison between those in the South and those in the south. Let's take a look at the PK results of the four capital cities in South China.
From the perspective of average temperature, it seems that the fourth and ninth seasons of these four cities correspond to lower temperatures. Although this is not cold, the saying that the third year is not true in South China. However, in terms of the extreme minimum temperature, the four cities all experienced colder temperatures in September, 2013.
In this way, "cold in September" is not a universal rule. In South China, "39" and "49" have different experiences. Send a map of the distribution of the coldest period in our country. Small partners from all over the country will take their seats and prepare the most cold resistant equipment in time.
According to China's annual climate data statistics, the coldest time in most of the year in the north of China is the middle of January (10-20 days), while in most of the south, it is the coldest in the last ten days of January. This year's March 9th is January 9th to 17th, which is exactly the middle of January. For most parts of the north, '39' will be colder. However, for some parts of the south, it was the coldest in late January, that is, in April and September.
However, there are also some areas that are 'different': most of the year in Western Sichuan and Yunnan is the coldest in late December, probably in the winter solstice solar term; some areas in Tibet and Xinjiang are the coldest in early January.
It is worth noting that this map is based on data from 1981-2010. With climate change, many areas in the middle and lower reaches of the Yangtze River, such as Nanjing, Nanchang, Hangzhou, Hefei and so on, have become colder during the period from September 4 to May 9 (late January). Of course, from the comparison of the coldest area in this picture, even at present, there is still a "market" for "cold in September" (mid January).
In the eyes of the data emperor, cold in September is a summary of climate, which is still applicable to most parts of our country, but it can't become an absolute reference standard in a single year or two.