Won't it be hot in early autumn?

It's not that it won't be hot after autumn. Although beginning of autumn will be a little chilly sooner or later, the sun is still fierce at noon, and it is so hot in summer and after the solar terms.

"It's cool on beginning of autumn Day" obviously associates beginning of autumn with cool weather. It can be seen that beginning of autumn is the beginning of cool autumn.

Because of the different latitudes and altitudes, it is practically impossible to enter autumn at the same time in beginning of autumn. According to the climatological standard that the five-day average temperature is between 10℃ and 22℃, in China, except those places with high altitude in north latitude, beginning of autumn is still in hot summer, and even in most parts of Northeast China, there is no autumn scenery with cool breeze and yellow leaves fluttering.

For the southern part of the subtropical zone, the summer heat is still very heavy in August all the year round. According to the statistics of climate data, South China will enter autumn in the middle and late September. It is impossible to say when autumn begins in the plateau mountainous area where winter is all the year round or winter is long without summer, and spring and autumn are connected.