It was 239 when I had a slight cold, and I was shivering with cold.

As the saying goes, "It's 239 when it's a slight cold, and it's shivering with cold", which shows the cold degree of the slight cold solar terms. Slight cold is December Festival, and the two points below the word "cold" are ice. Shuowen releases cold as freezing, but it is not extremely cold at this time, but extremely cold.

The phrase "it's not cold to go out" means that during the slight cold, no matter whether it's cold or not, even if it's sunny outside, you will still tremble involuntarily when you go out.

In fact, it means that the weather is very cold during this period, and the key point is to highlight a cold word. For China, a slight cold marks the beginning of the coldest day of the year.

A slight cold means that the weather is already very cold. The periods of slight cold and severe cold in most parts of China are generally the coldest. As soon as the "slight cold" passes, it will take three or nine days to "get out of the ice".

Slight cold usually occurs from February 9th to March 9th, which is the coldest time of the year in northern China. After the slight cold, the temperature of the severe cold rose slightly.

From a scientific point of view, in the slight cold season, the direct point of the sun is still in the southern hemisphere, and the heat in the northern hemisphere is still in a state of loss. The heat absorbed during the day is still less than the heat released at night, so the temperature in the northern hemisphere continues to decrease.

Cold air is cold for a long time, and slight cold means that the weather is cold but not extreme. Like severe cold, mild summer heat, severe summer heat and intense summer heat, it is a solar term indicating temperature change. The slight cold solar term is characterized by cold, but it is not extremely cold.