When did the weather start to get cold?

Although beginning of autumn bid farewell to summer, in many parts of China, the temperature will not drop immediately after beginning of autumn. Because of the appearance of autumn tigers, the weather will be hot for at least a month. It is generally necessary to set solar terms everywhere before going out. If the weather is really cool, it is usually after the Millennium solar terms. The Millennium is September 7, 2022. At this time, the summer monsoon is gradually replaced by the winter monsoon, and the cold air gradually goes south frequently, and the sultry weather will improve.