How long will it be cool after beginning of autumn?

It was cool about 15-20 days after beginning of autumn.

After beginning of autumn, the hot weather may not subside until the summer heat or the Millennium. After beginning of autumn,15th day is the summer solar term, which means to relieve summer heat. Generally, the temperature will gradually decrease at this time. If you encounter autumn tiger weather, you have to wait until the Millennium solar term, which means that the temperature drops. At this time, there will be basically no continuous high temperature weather.

Beginning of autumn is the thirteenth of the twenty-four solar terms, and it is the beginning of autumn. The bucket refers to the southwest, and the sun reaches the longitude of 135, and it is celebrated on August 7 or 8 of the Gregorian calendar every year. "Reason" means the beginning; "Autumn" means that the grain is ripe. The change of the whole nature is a step-by-step process, and beginning of autumn is a turning point in which the Yang gradually closes, the Yin gradually grows, and the Yang gradually gets cloudy.

Meteorological changes:

Beginning of autumn doesn't mean the end of hot weather, and there is a summer solar term after beginning of autumn. Beginning of autumn is still in midsummer, but it hasn't come out yet. The second solar term came out in autumn, and it was still very hot in early autumn. As the saying goes, "heat is in the dog days". According to the calculation method of "dog days", beginning of autumn is often still in the dog days until it is hot in summer.

"Three volts" involves four solar terms, namely, summer heat, beginning of autumn and early summer. In the dog days, the subtropical high was strong in July and August, which controlled most parts of eastern China. Under the control of subtropical high, the weather is sunny, hot and high temperature, so the "dog days" belong to the hot summer, so it is also the hottest period of the year.

Judging from the climatic characteristics, the autumn sun is like fire, beginning of autumn is hot, and many areas are still hot. Beginning of autumn is the third hot solar term among the 24 solar terms, second only to Daxia and Xiaoxia.