How does the weather change in autumn equinox and cold dew season?

After the autumnal equinox, according to the perennial law, autumn in Jiangsu, Zhejiang and Shanghai is from the end of September to the beginning of 10. In the northeast, Xinjiang and other places, autumn comes in the middle and late August, the lower reaches of the Yellow River in mid-September, and the land in South China will feel cool in autumn from the end of 10 to10.

During the cold dew period, the heat of cold air in the north is enhanced, and most parts of China are controlled by cold high pressure. At the end of the rainy season, it is often sunny in Wan Li, with warm days and cool nights, and the daily temperature difference is large, which is conducive to the fruiting of late rice.

The average daily temperature in the middle and lower reaches of the Yangtze River ranges from 16 degrees to 19 degrees, and the rainfall continues to decrease, about 15 mm to 30 mm. The cold dew solar term is the suitable period for direct seeding rape in the Yangtze River basin, and winter wheat is planted in Jiangbei area.