What's the climate like in the first frost solar term?
Does the first frost belong to winter or autumn? Astronomically speaking, the first frost is still autumn, because it belongs to the scope of autumn solar terms. But in terms of climate, the first frost in some parts of northern China has entered winter, and it is generally autumn in the south.
The national average temperature before and after the first frost is 10℃~20℃. The highest temperature cities are Sanya, Beihai and Fuzhou, and the average temperature is around 25℃. The cities with the lowest temperature are Harbin, Changchun, Yinchuan and Hohhot, and the average temperature is around 1℃.
What's the climate like in the first frost solar term? The main climate feature in autumn is dryness, and the temperature gradually turns cold. The first frost is a solar term reflecting the temperature change. Cold weather begins with the first frost, which is the last solar term in autumn. It is the transition from autumn to winter, which means that winter is coming. After the first frost, the temperature difference between day and night is large, the weather is cold in the morning and evening, hot at noon, and the autumn dryness is obvious. After the first frost, the plants gradually lost their vitality and the land was desolate.
From a scientific point of view, the saying that "dew becomes frost" is not accurate. The frozen dew formed by dew freezing is hard small ice beads.
Frost refers to the white ice crystals that condense on the ground or objects when the radiation cooling of the ground cools the air close to the ground below the frost point.
Frost refers to the phenomenon of crop freezing injury caused by the sudden drop of temperature, so frost does not necessarily appear when frost occurs, and frost does not necessarily appear when frost occurs;
However, due to the low temperature during frost, if the temperature continues to drop, it will easily lead to frost.
The first frost solar term is generally around the Gregorian calendar1October 23rd 10 every year. At this time, the cold air goes south, the weather is getting colder and colder, and it is colder in the south of China in the morning and evening;
However, some parts of the north have already entered winter, and the temperature in some areas has dropped below 0 degrees Celsius. For example, the average temperature in the northeast, eastern Inner Mongolia and most parts of the northwest has been below 0 degrees Celsius.