What month is the lunar calendar dew?

The Millennium in 24 solar terms is around September 7th of the Gregorian calendar every year.

At this time, "the cool wind is coming, the dew is falling, and the cicada is singing." According to the explanation of "white dew" in the twenty-four solar terms-"water and soil condense dew, autumn belongs to gold, golden white and white dew, and qi begins to be cold". The ancients also said in Xiao Weijing: "The fifteenth day after the summer heat is white dew", and the yin is getting heavier and heavier, and the dew condenses into white. "

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There is almost no dew precipitation. Night dew precipitation in temperate regions is equivalent to 0.1-0.3mm precipitation layer, but it is considerable in many tropical regions. Dew precipitation at night is equivalent to 3 mm, with an average of about 1 mm.

Although the amount of dew is limited, it is beneficial to plants, especially in arid areas and dry and hot weather. Dew at night often has the function of maintaining plant life. For example, in the deserts of Egypt and Arabia, although there has been no rain for several months, plants can still grow and develop on dew.