The temperature in the light snow stage is lower than that in winter. Entering this solar term, the northeast wind in China began to become a frequent visitor, and the temperature gradually dropped below 0℃, but the earth was not too cold. Although it began to snow, the amount of snow was not large, so it was called light snow. The average first snow period in the middle and lower reaches of the Yellow River is basically the same as the light snow solar terms. Although it began to snow, the amount of snow was generally small, and it was frozen at night and turned around by day. If the cold air is strong and the warm and humid air flow is active, it may also snow heavily;

Winter begins in the northern part of the southern region. "Lotus has no shelter from the rain, and chrysanthemums still have branches in Ao Shuang" has always been the scene of early winter.

What does light snow mean?

During the light snow solar term, a relatively stable meridional circulation has been established in East Asia, and low pressure or trough often appears in Siberia. When moving eastward, there will be a large-scale cold air going south, and there will be a large-scale gale and cooling weather in eastern China. Light snow solar term is a solar term with high frequency of cold wave and strong cold air activity. When strong cold air affects, it is often accompanied by the first snow in winter.

In ancient China, light snow was divided into three periods: "When the rainbow disappears, the weather rises and the atmosphere falls, and when it is blocked, it becomes winter.