What is the standard for entering spring?

There is a strict definition in meteorology, that is, the average daily temperature for five consecutive days passes 10℃ and is lower than 22℃, which is regarded as spring, and the first day of five days is spring.

If the temperature recurs after early spring, for example, the average temperature is lower than 10℃ for five consecutive days, the beginning of spring date will be modified. In addition, the length of winter will be compared in order to finally decide the date of spring.

Extended data:

There are two concepts of entering spring, one is astronomical and the other is climatic. Astronomical beginning of spring time is unified, that is, after beginning of spring; On the other hand, the time of entering spring varies from place to place. In general, the time of spring in south China is earlier than that in north China, especially in south China and southeast China.

Now is the key season of spring, the climate is very unstable, especially the "late spring cold" weather occurs frequently, so we must take preventive measures.

Reference: People's Daily Online-The daily average temperature in Beijing exceeds 10℃, and the standard for entering spring is 12 years.