Which solar term does the cold dew belong to?

Cold dew is the seventeenth solar term in the twenty-four solar terms of the lunar calendar and belongs to the fifth solar term in autumn.

Cold dew is a solar term reflecting the characteristics of climate change, and cold refers to cold. It can be seen from the literal meaning that the weather has obviously turned cold at this time. Compared with the white dew, the temperature has dropped a lot, and the dew on the ground is colder, which is likely to become frozen dew, so it is called cold dew. Generally speaking, the cold dew season falls on1October 8 or 9 of the Gregorian calendar every year. On a cold dew day, the sun reaches 195 degrees.

White dew, cold dew and first frost all indicate the phenomenon of water vapor condensation. At this time, the temperature in most parts of South China continued to drop. The average daily temperature in South China is less than 20℃. Even in the areas along the Yangtze River, it is difficult for the temperature to rise above 30℃, while the minimum temperature can drop below 10℃. Except for a few valley lowlands, the average temperature in the northwest plateau is generally lower than 10℃, which is already winter according to the standard of climate division of four seasons.

The influence of cold dew solar terms on climate

After the cold dew, the cold air in the north has a certain influence, and most parts of China are controlled by cold high pressure, and the rainy season is over. The weather is often warm during the day and cool at night, with clear skies and Wan Li, which is very beneficial to the autumn harvest. Thunderstorms have disappeared in most parts of Chinese mainland, and thunder can be heard only in parts of Yunnan, Sichuan and Guizhou. The precipitation in June 5438+ 10 in North China is generally only half or less than that in September, while in Northwest China it is only a few millimeters to more than 20 millimeters.

At this time, it is still autumn rain in Hainan and Southwest China, and rainy weather will also occur in Jianghuai and Jiangnan in a few years, which will have a certain impact on autumn harvest and autumn planting. When the weather is good, we should pay close attention to harvesting cotton. When the temperature drops early, we can take it back when the temperature is not too low. One-season late rice is about to mature in Jianghuai and Jiangnan, and double-season late rice is filling. Pay attention to intermittent irrigation to keep the fields moist.