The Start of Autumn does not mean the end of the hot weather, and there is another solar term after the start of Autumn. Beginning of Autumn is still in the heat, not yet out of the heat, the second solar term of autumn (End of heat) out of the heat, the weather is still very hot during the early autumn. According to the calculation method of "three volts", Beginning of Autumn to End of Heat is often still in the "three Volts" period, "three Volts" involves major and minor heat and Beginning of Autumn, End of Heat four solar terms. "Dog Days" In July and August, the subtropical high is strong, controlling most parts of eastern China, under the control of the subtropical high, the weather is hot and hot, so "dog days" is a hot summer, so it is also the hottest period of the year. From its climate characteristics, the autumn sun is raging, the beginning of autumn is summer, many areas are still in the heat. Beginning of Autumn is the third solar term after Major Heat and Minor Heat among the 24 solar terms

Entering autumn means that rainfall, humidity, etc., are at a turning point in the year and tend to decline or decrease. The rainfall, dry humidity and so on change obviously in the southern region. In the north, the obvious change is the temperature. After entering autumn, in nature, Yin and Yang Qi begin to change, all things begin to grow from lush to bleak and mature, and the climate begins to transition from rainy and hot summer to less rainy and dry autumn climate. Start of Autumn marks the beginning of the seasonal change, but it does not mean that the temperature will drop immediately. The last of the "Three volts" is also after the Start of Autumn solar term.

The watershed between hot and cool is not in the Start of Autumn Solar term, and the real cool is generally after the white Dew solar term. After the beginning of autumn, there are "autumn tigers". "Autumn tiger" mostly occurs in the Gregorian calendar from late August to September each year, this period is usually about half a month after the end of heat, sometimes lasting one or two months. But "autumn tigers" don‘t necessarily appear every year. Meteorological data show that this hot climate often lasts until the middle and late September, and the weather can gradually cool up.

The four seasons are often divided according to the "pentad average temperature method", and the average daily temperature for five consecutive days is between 10℃ and 22℃. According to the standard for dividing the seasons by the temperature method, the daily average temperature in the second half of the year falls steadily below 22 ° C for the beginning of autumn, except for the regions where winter and spring and autumn are connected without summer, there are few areas in China that enter the "pentheaverage temperature" (between 10 ° C and 22 ° C for five consecutive days) on the "Start of Autumn".