What's the approximate temperature during Cold Dew? What is the difference between the Cold Dew and White Dew solar terms?

What's the approximate temperature during Cold Dew? What is the difference between the Cold Dew and White Dew solar terms?
Cold Dew is coming. Do you want to know more about it? The ninth month of the lunar calendar belongs to autumn, the harvest season. In this golden month, the crops in the fields enter the harvest month. Welcome to the September 2021 special topic on Shuimoxiansheng.com to learn more about the ninth month of the lunar calendar.

What's the approximate temperature during Cold Dew?

After the Cold Dew, it is late autumn. Some areas in the north have gradually transitioned to winter, and most areas in the south are in late autumn, but there will be a significant drop in temperature across the country.
During the Cold Dew season, there is more dew and the temperature is lower. At this time, frost will occur in some areas of China. The north has entered deep autumn with white clouds and red leaves, and occasional early frost. The south is also entering autumn with cicadas silencing and lotus leaves withering. At this time, the temperature in most parts of southern China continues to drop. The average daily temperature in South China is less than 20℃ . Even in the coastal areas of the Yangtze River, the temperature hardly rises above 30℃ , while the lowest temperature can drop below 10℃ . Except for a few river valley lowlands in the northwestern plateau, the average temperature is generally below 10℃ . Measured by the standards of climatology for dividing the four seasons, it is already winter.

What is the difference between Cold Dew and White Dew?

Bailu is the third solar term in autumn, and Hanlu is the fifth solar term in autumn. One belongs to early autumn, and the other one belongs to late autumn. Although both have the phenomenon of "dew condensation", there are still big differences between them.
White Dew solar term:
Bailu is the fifteenth solar term in the twenty-four solar terms and the third solar term in autumn. It marks the end of the Shen month and the beginning of the You month in the Ganzhi calendar. The Big Dipper points to Gui; the Sun reaches 165 degrees of the ecliptic longitude; the solar term occurs on September 7-9 in the Gregorian calendar.
The ancients matched the four seasons with the five elements. Autumn belongs to gold, and gold is white, so white is used to describe autumn dew, hence the name "Bai Lu". By the time of Bailu, the summer monsoon is gradually replaced by the winter monsoon, and the cold air turns from defense to offense. In addition, the sun's direct point moves south, the daylight time in the Northern Hemisphere becomes shorter, the light intensity weakens, and the ground radiates heat quickly, so the temperature drops gradually faster. The White Dew basically ends the sultry summer heat, the weather gradually turns cooler, and the cold weather causes dew to condense.
Cold Dew solar term:
Cold Dew is the seventeenth solar term in the twenty-four solar terms, the fifth solar term in autumn, and the beginning of the Xu month in the Ganzhi calendar. The Big Dipper points to Wu; the sun reaches 195° of the ecliptic longitude; the solar term occurs between October 7th and 9th in the Gregorian calendar.
"Collected Explanations of the 72 Seasonal Changes" says: "In the ninth month, the dew is cold and is about to condense." The temperature at this time is lower than that during "White Dew", there is more dew, and the days are chilly, hence the name "Cold Dew". After the Cold Dew, the cold air in the north has gained a certain strength, most parts of my country are under the control of cold high pressure, and the rainy season has ended. From the perspective of climate characteristics, during the Cold Dew season, autumn becomes increasingly intense in the south, with cool weather, little rain and dryness; most areas in the north have entered or are about to enter winter from late autumn.

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