Autumn is not the same as the beginning of fall.

The day of autumn is not a watershed between hot and cool, and the beginning of autumn does not mean the end of hot weather. Autumn is still in the summer heat period, not yet out of the summer, to the summer festival only out of the summer. After the fall, there is still at least "a volt" of hot weather.

According to the "three volts" projection method, "Autumn" this day is often still in the middle of the volts period, that is to say, the summer heat is not over, people really feel the coolness of the fall, generally to the White Dew after the festival.

Meteorological "into the fall" has a strict temperature standard

China's current meteorological division of the four seasons is often divided according to temperature changes. According to the People's Republic of China *** and the country's meteorological industry standard "climate seasonal division", the spring for the average daily temperature or 5-day sliding average temperature (to a day and forward sliding 4 days *** 5-day average temperature) is greater than or equal to 10 ℃ and less than 22 ℃.

Summer is when the average daily temperature or 5-day sliding average temperature is greater than or equal to 22℃; fall is when the average daily temperature or 5-day sliding average temperature is less than 22℃ and greater than or equal to 10℃; and winter is when the average daily temperature or 5-day sliding average temperature is less than 10℃.