Beginning of autumn is divided into three stages, one is cool; Second, wait for the white deer to be born; Three are waiting for cicadas to sing. What does "wait" mean?

Beginning of autumn doesn't mean the extreme hot weather is over. Beginning of autumn is still in the summer heat period, and the summer heat will not come out until the second solar term in autumn. It's still very hot in early autumn. The so-called "heat is in the dog days" is also called "beginning of autumn drops later", and there is at least "falling" hot weather after beginning of autumn.

According to the calculation method of "dog days", the days of "beginning of autumn" are often in the middle of dog days, that is to say, the heat is not over, and the real coolness usually comes after the Millennium solar terms. The watershed of summer heat is not in the solar terms in beginning of autumn.

Meteorological change

At present, the "weather average temperature method" is often used to divide the four seasons, and the average daily temperature for five consecutive days is between 10℃ and 22℃. In fact, according to the standard of dividing seasons in climatology, beginning of autumn will be when the average daily temperature drops below 22℃ in the second half of the year. Except for the summer-free areas connected with the spring and autumn all the year round, few areas in China have entered the "climate average temperature" in beginning of autumn (between 10℃ and 22℃ for five consecutive days).

Beginning of autumn means rain, storm, humidity, etc. It is at the turning point of the year and tends to decrease or decline. Seasonal changes, rainfall, rainstorm, dry and wet changes in southern China are obvious; In the northern region, these changes are not obvious, but the temperature is obvious. After entering autumn, in nature, the qi of Yin and Yang began to change, everything began to grow from lush to mature, and the climate began to transition from rainy and humid in summer to dry and rainy in autumn.