China's ancient book records: "On the August Festival, the yin is getting heavier and the dew is white." According to the climate law, the cool autumn wind blows all over Huaibei from north to south in the white dew season.

2. The temperature difference between day and night is large throughout the year.

As the saying goes: "A thousand years is divided into autumn nights, and one night is cold." At this time, the summer monsoon is gradually replaced by the winter monsoon, with more northerly winds and cold air gradually moving south frequently. In addition, the position where the sun directly touches the ground moves south, so the sunshine time in the northern hemisphere becomes shorter and the sunshine intensity weakens. At night, it is often partly cloudy and sunny, and the ground radiation dissipates quickly, so the temperature gradually drops and the weather becomes colder and colder.

Extended data:

Pay attention to the Millennium solar terms of diet:

1. In climate, another notable feature of the millennium is "dryness". The autumn wind blew away the high temperature and dried the moisture in the air. Traditional Chinese medicine calls it "autumn dryness", and many people will have symptoms such as dry mouth, dry throat and dry skin.

3. "In terms of eating, seasonal sweet potatoes and longan are more popular." Gao Wei added that simple dietotherapy to remove dryness is also quite effective, such as longan, which can benefit qi and strengthen the spleen, and can also treat anemia, insomnia and other diseases, and is suitable for eating.

4. "You need warm supplements in autumn. You can eat duck or eat some fruits and vegetables to prevent autumn dryness. " Wang Juan, a folklore expert, said that all kinds of pears, grapes and grapefruit can be eaten, or some porridge with dampness and dryness can nourish the stomach. "Chrysanthemum tea is also a good product for removing fire."

Reference link: People's Network-What is the importance of Bailu solar terms? Don't expose yourself by wearing clothes, and pay attention to dryness in diet.