Is there a scientific basis for beginning of autumn's early cold dead cows and beginning of autumn's hot dead cows?

There is no accurate basis, it is cool in early autumn and hot in late autumn. People think that if autumn starts in the morning, it will be cool, and if autumn starts in the afternoon, it will be hot for a while. The meteorological department said that the factors affecting the weather are very complicated, and the current meteorological monitoring is still uncertain. However, if the subtropical high controls the southern region for a long time in the process of going south, it will appear in summer.

This year is the end of autumn. Because the specific beginning of autumn time is after 2 1, not before noon. It's early autumn in the morning and early autumn in the afternoon. The National Climate Center divides the years into two groups: early autumn and late autumn, and calculates the average temperature from early autumn to the end of 2009 and from 201July to August. The comparative data is when the national average annual temperature is 20.4℃. This year is early autumn, and the lunar calendar date in early autumn is the basis for determining the morning and evening.

If it is June, it is early autumn; If it is July, it is early autumn. In this way, this year's beginning of autumn is June 26th, and it is undoubtedly beginning of autumn. The working people in ancient China have accumulated a great deal of astronomical and meteorological knowledge in their production practice, many of which are reflected in folk proverbs, and their correctness can stand the test of time.

People used to talk about the lunar calendar, which is different from today. Early autumn should refer to the morning and evening of the Mid-Autumn Festival in the lunar calendar, not the morning and evening of a day. Solar terms represent weather phenomena and are directly related to farming time. The time of each solar term in the solar calendar is fixed, because the solar calendar is based on the revolution of the earth around the sun. On August 7th and 8th every year, beginning of autumn is not bad, and the temperature in August will not be much different, but in the lunar calendar, the solar terms change every year.

Autumn in other years starts from June 17 to July 7. It can be seen that the difference between early autumn and early autumn can be one month, that is to say, there may be two solar terms on the same day of the lunar calendar.