Six solar terms in autumn

The six solar terms in autumn are beginning of autumn, Grade Three, Bailu, Equinox, Cold Dew and First Frost.

Beginning of autumn: beginning of autumn means that autumn is about to begin. There will be a breeze in the morning and evening, but the temperature is still high during the day, especially at noon.

Summer heat: The arrival of summer heat means that the hot summer is coming to an end, the weather is getting colder, and the cooling tools such as fans and air conditioners are slowly idle. There is a saying, "Autumn is beautiful in summer".

White dew: After entering the solar term of white dew, the temperature drops rapidly at night, which is easy to reach the condition of condensation. The temperature is high, but it is low at night. Because the temperature drops rapidly, the water vapor in the air condenses into dew.

Autumnal Equinox: At this time, the sky is high and the clouds are white, giving people the feeling that the sky is high and the clouds are light and the autumn is crisp.

Cold dew: In the cold dew season, the weather is cooler, but it is not cold enough.

The first frost: The first frost said that the weather would get cold gradually, the dew would frost, and the field work had entered the final stage.

The general characteristics of autumn

Traditionally, China takes "beginning of autumn" in the 24 solar terms as the starting point of autumn, and the word "autumn" is composed of "harmony" and "fire", indicating the maturity of grains. After entering autumn, in nature, everything began to mature from lush, and its climate began to transition from rainy and humid in summer to dry and rainy in autumn.

In China, the four seasons are usually divided according to the temperature change, which is divided by the "average temperature" of modern scholar Zhang Baokun. According to the average temperature method, there are two main criteria for judging autumn. First, the average daily temperature for five consecutive days is between 10℃-22℃, which can be regarded as autumn and become a "short mark"; Second, the moving average temperature of five consecutive groups is lower than 22℃. A set of moving average temperatures refers to the average temperature of the day plus the average temperature of the previous four days divided by 5 to get the moving average temperature of five days. This is the "sliding scale". Autumn divided by temperature means cool.