Cold dew and rain, is it cold in winter?

Cold dew is the seventeenth of the twenty-four solar terms. During the cold dew season, the temperature gradually drops, and the northern region begins to enter winter, while the southern region gradually enters autumn. There is a certain correlation between the solar terms of cold dew and the winter temperature, because the weather performance on the day of cold dew can predict the winter temperature of that year.

There are some agricultural proverbs about the relationship between cold dew and rain and winter temperature. For example, there is a proverb that says "cold dew and rain, winter solstice snow". This means that if it rains on the day of cold dew, it may be rainy and rainy in winter. So if it rains, it may be colder in winter.

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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After the cold dew, if there is strong cold air going south, the cold dew wind weather with low temperature and strong wind is easy to appear in the south. Cold dew wind is a chilling injury caused by the invasion of cold air in autumn, which reduces rice production. It is one of the main meteorological disasters in the growth period of late rice in southern China, which mostly occurs around the cold dew festival in the southern lunar calendar. Therefore, Guangdong, Guangxi and Fujian are called cold dew wind, and the Yangtze River basin is called autumn low temperature.

In the cold dew season, wheat should be sown in the north, not late, so as not to reduce production. South China should sow rape and plant broad beans in due course. There will be a disastrous weather in South China-Mianyu, which is characterized by high humidity, more clouds, less sunshine and more cloudy days. After that, the number of foggy days will increase obviously, which will directly affect the progress and quality of Sanqiu. Therefore, it is necessary to use the weather forecast to harvest and sow in sunny days.

The above contents refer to Baidu Encyclopedia-Cold Dew.