What time is the cold dew today?
At this time, the temperature is lower than when it is "white dew", with more dew and strong chill. In most parts of our country, the weather is cool, the rainfall is reduced, and the autumn grain will mature one after another.
In ancient times, dew was considered as a sign that the weather turned cold. The solar term of the Mid-Autumn White Dew is "dew condensation and white". It is cold in season and autumn, and it is already "dew gas is cold and will condense" into frost.
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 mercury column to rise above 30℃, while the minimum temperature can be reduced to below 10℃.
Except for a few valley lowlands, the five-day average temperature in the northwest plateau is generally lower than 10℃, which is already winter according to the standard of four seasons climate division. Thousands of miles away, first frost and Wan Li are snowing, which is very different from autumn in South China.
Historical origin:
Cold dew is the end of the full moon in the dry calendar and the beginning of the full moon. At night, looking up at the starry sky, you will find that the "Big Mars" (Antares) representing midsummer has sunk into the west. After the cold dew, the height of the sun continued to decrease and the temperature gradually decreased. Cold dew is called "cold dew" because the temperature is much lower than that of Bailu solar terms, and cold produces dew condensation.
"Twenty-four solar terms" said: "In September, the dew is cold and will condense." At this time, the temperature is lower than when it is "white dew", with more dew and chill day and night.
There is a proverb in China called "Dew first turns white and then cold", which means that after the dew festival, the dew turns from a little coolness in early autumn to a little coolness in late autumn. There is also a proverb about cold dew: "Cold dew spans three dynasties, and you need to find a bridge after crossing the water", which means that the weather is already chilly and you can't wade across the river or go to the fields barefoot as before.
During the cold dew, people can obviously feel the change of temperature difference. From white and crystal dew to freezing cold, it vividly reflects the continuous decline of temperature. As the cold intensifies, everything becomes dim.
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