The rapid temperature drop is a feature of the cold dew solar terms. After the autumn wind and autumn rain brought by a strong cold air, it is common for the temperature to drop by 8℃ and 10℃. However, most of the stormy weather doesn't last long (except in West China). Under the control of cold and high pressure, the days are warm and the nights are cool, and the days are often crisp in autumn, and the weather becomes drier.
2. Cold air frequently goes south.
According to climatology, after the cold dew, the cold air in the north has a certain influence, and most parts of China are under the control of cold high pressure, and the rainy season is over. The weather is often warm in the day and cool in the night, with clear skies in Wan Li and a scene of late autumn. In normal years, at this time, the isotherm of 10℃ has moved southward to the Qinling Mountains and Huaihe River, and generally dropped below 0℃ to the north of the Great Wall. In most years of the capital Beijing, the first frost can be seen at this time.
3. The weather and precipitation are scarce, and thunderstorms almost disappear.
10.8 is the "cold dew" in the 24 solar terms, which means the turning point from cool to cold in a year. With the arrival of cold dew, most parts of China will turn cold, and the northeast and northwest regions have entered or are about to enter winter, with less rain. ?
The custom of cold dew solar terms
1, Denggao
Because the Double Ninth Festival is around the cold dew solar terms, and the climate with pleasant cold dew solar terms is very suitable for mountaineering, the custom of climbing slowly on the Double Ninth Festival has also become the custom of cold dew solar terms. Climbing means "step by step" and "long life".
2. Watch the red leaves
In the cold dew season, the autumn wind is rustling, and the red leaves on the mountain are as beautiful as Xia Jin and picturesque. Walking on the winding path and looking at the hillside, you will see clusters of red leaves.
3. Fishing in autumn
Because of the cold dew season, the temperature drops rapidly, the sun in the deep water is not penetrated, and the fish swim to the shallow water with higher water temperature, so it is called "fishing in autumn".