In which months does it start to get warmer?

It usually gets warm in late February, but in northern areas the temperature doesn’t start to get warmer until at least around the Qingming Festival. In terms of the radiation intensity of the sun to the earth, the winter solstice is the smallest and the summer solstice is the largest.

In Chinese climatology, the beginning of spring is often defined as the first day when the daily average temperature stabilizes above 10°C every five days, which is inconsistent with the meaning of the beginning of spring in the middle and lower reaches of the Yellow River.

In late February, only South China truly enters spring. But this division method is more realistic. The temperature rises after the beginning of spring, and the busy spring plowing season begins one after another in most parts of the country.

Analysis of solar terms:

The twenty-four solar terms were established in the pre-Qin period of China and were fully established in the Han Dynasty as a supplementary calendar to guide farming. It was based on observing the annual movement of the sun. A knowledge system formed by understanding the changing patterns of seasons, climate, phenology, etc. throughout the year.

It divides the sun's annual movement track into 24 equal parts, each equal part is a solar term, starting from the beginning of spring and ending with the Great Cold, and the cycle begins again and again. It is not only the time criterion promulgated by the officials of the past dynasties, but also the compass guiding agricultural production. , the compass used by people to predict cold, warm, snow and rain in daily life, is the crystallization of the long-term experience and wisdom of the working people of the Chinese nation.