Is 10.25 autumn or winter?

10.25 is autumn.

According to modern meteorology, autumn in the northern temperate zone ranges from August 23 (summer heat) to November 22 (light snow); autumn in the southern temperate zone ranges from February 19 (rain in the northern hemisphere) to May January 21st (Little Full in the Northern Hemisphere).

Nowadays, the four seasons in my country are often divided according to temperature changes, using the "climate average temperature" classification by modern scholar Zhang Baokun.

According to the zonal average temperature method, there are two main criteria for determining the beginning of autumn. One is: if the daily average temperature for five consecutive days is between 10℃ and 22℃, it can be regarded as the beginning of autumn and become a "simplified standard" ; The second is: 5 consecutive groups of sliding average temperatures below 22°C.

A set of sliding average temperatures refers to the average temperature of the day plus the average temperature of the previous four days divided by 5 to obtain a 5-day sliding average temperature, which is a "sliding scale". Entering autumn means that the hot weather is over and the weather is beginning to cool down.

Temperature:

The Beginning of Autumn does not mean that the hot summer is about to end. The Beginning of Autumn is still in the hot summer period and has not yet started. The summer heat will not start until the second solar term of autumn (end of summer). During the early autumn period The weather is still very hot.

The so-called "heat is in the three volts". According to the calculation method of "three volts", the period from the beginning of autumn to the end of summer is often still in the "three volts" period, so the weather in early autumn is still very hot, and the real coolness usually does not come until after the Bailu solar term. The dividing line between hot and cold is in autumn, not at the turn of summer and autumn. The climate in autumn is divided into two stages. The early autumn is "sultry", and the mid-autumn period tends to be "dry" and "cool".

The four seasons are divided according to the climatic average temperature of modern scholar Zhang Baokun. The indicator is that the period when the average temperature is below 10℃ is winter, the period above 22℃ is summer, and the period between 10 and 22℃ is spring and autumn respectively. .

The autumn standard of climatological average temperature adopted in meteorology is: after the heat, autumn is entered when the five-day average temperature stabilizes below 22℃, and autumn ends when it is below 10℃ (average temperature: the same The average temperature of the four time periods of 0:00, 6:00, 12:00 and 18:00 in the day), entering winter.