Why is it still so hot in early autumn?

The saying of "autumn tiger" has certain scientific basis, but the older generation used vivid metaphors. Autumn tiger, that is to say, after the dog comes out, it exists for a period of time, and the weather temperature rises above 35℃, which usually appears at the end of August and the beginning of September.

Meteorologically speaking, "autumn tiger" is a meteorological phenomenon. Due to the influence of the subtropical high in the western Pacific on China's climate, it will move southward and northward at this time, resulting in cloudy days, strong solar radiation and rising temperature in China.

Beginning of autumn doesn't mean the temperature has dropped. It's not autumn yet. There is a clear definition of "autumn" in meteorology, that is, the average temperature in beginning of autumn for five consecutive days is below 22℃, which is the real autumn.

Summer:

The next solar term in autumn is "long summer", which means "summer". The hot weather in most areas has officially ended. This year's summer vacation began on August 23rd, officially ended on September 7th, and the "Millennium" solar term came on September 8th.

Therefore, from the meteorological definition of "autumn tiger" and the specific date of late summer, before September 7, some areas were getting colder and colder in the morning and evening, but it was still slightly hot in the afternoon.