It's a mild cold and hot weather, not a severe cold.

If the weather is warm in the mild cold season, it will definitely be cold in the severe cold season.

The agricultural proverb "It's hot when it's slightly cold, and cold when it's extremely cold" means that if it's warm on the day of the slight cold solar term (meaning it's sunny if it's not raining), it will be very cold during the severe cold solar term.

"The slight cold is not cold, and the Qingming quagmire" tells a truth: If the temperature and weather are not cold in the slight cold season, it will be rainy in Tomb-Sweeping Day in the next year.

Slight cold two-part allegorical saying

"On a mild cold and rainy day, the seedlings freeze to death by rain" means that if it rains on the day of the mild cold solar term, the temperature will be lower during the rainy and shocking solar term, and there will be a phenomenon of late spring cold, and the seedlings are likely to freeze to death, so we should pay attention to the warmth of the seedlings and postpone the sowing time.

"It doesn't snow in a slight cold, but it cracks in a small summer field." These two sentences have similar meanings. It is said that if it doesn't snow (or rain) in the two days of slight cold and severe cold, it will definitely not rain in the next few days of little summer and big summer, and the crops in the field will be seriously short of water.

In the north, slight cold solar terms are colder than great cold solar terms, and there is a saying in the north that "slight cold is better than great cold"; However, for some parts of the south, the lowest temperature in the whole year will still appear in the great cold solar terms. The slight cold in northern China is colder than the severe cold, because there is relatively little "residual heat" on the surface, which has been completely released by the slight cold, so that the temperature is minimized. In the south, the surface is relatively hot, and its "residual heat" was not released until the slight cold. In severe cold, the surface "waste heat" is exhausted and the temperature is minimized.