The slight cold is close at hand. What does it mean to close the door all day?

The slight cold came, the weather was cold, my hands were too cold to open, and I hid at home and closed the door all day.

This sentence is a folk proverb, which is used to describe slight cold and express the cold degree of slight cold solar terms.

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.

Extended data:

The climate in south and north of China is quite different. According to China's long-term meteorological records, the slight cold solar terms in the northern region are colder than the severe cold solar terms; But for most parts of the south, the big cold solar terms are colder than the small ones.

According to the statistics of climate data, the coldest period of a year in most parts of northern China is the middle of June (10-20) of Gregorian calendar every year. The annual slight cold solar term starts from 65438+1October 5-7, one solar term is about 15 days, and the middle section is just within the slight cold solar term;

So for most parts of the north, slight cold is indeed colder than severe cold. But for most parts of the south, it is the coldest in the great cold solar terms; The severe cold solar term generally starts from 65438+1October 20th (65438+1late October), which is the coldest time of the year in the south.