What is the standard temperature in meteorology for entering spring, summer, autumn and winter?

The average temperature for five consecutive days 10℃ is the spring standard in meteorology.

The standard of entering summer is that the daily average temperature is stable above 22℃ for five consecutive days.

The average daily temperature for five consecutive days is lower than 22℃, which is the standard for entering autumn.

The winter standard is that the daily average temperature is lower than 10℃ for five consecutive days.

Meteorology is a subject that takes the atmosphere as the research object, explains the characteristics of the atmosphere from both qualitative and quantitative aspects, and focuses on the study of the weather conditions and changing laws of the atmosphere and the weather forecast.

References:

Baidu meteorological encyclopedia