What is the solar term climate after the first frost?

The first frost was followed by the solar terms in beginning of winter. Beginning of winter is on165438+1October 7th or 8th in the Gregorian calendar every year, which is19th in the 24 solar terms. The first frost indicates that autumn is coming to an end, while beginning of winter indicates that winter is about to begin. Therefore, the first frost and beginning of winter are transitional solar terms. Traditionally, our people think that this day is the beginning of winter. Winter, as the end, means that after a year of field work, crops will be harvested.

The solar term of the first frost means that the weather is getting colder and first frost begins. The average temperature in the northeast, eastern Inner Mongolia and most of the northwest has been below 0℃, the soil has frozen, and the winter crops have stopped growing and entered the wintering period. To the south of latitude, the average temperature is around 16℃, and there are two or three solar terms before the first frost day.

In the southern valley of South China, frost can only be seen in the dead of winter. Of course, even at the same latitude, the temperature and humidity of the air near the stratum are different because of the different altitude and topography, and the first frost period and frost day are also different.

The first frost is a season that reflects phenological changes. On this day, the sun moves to the longitude of 265,438+00 degrees. At noon that day, the shadow of the sun was measured in standard meters. The shadow length is 9 feet 1 inch for 6 minutes, which is equivalent to 2.05 meters today. At night, the bucket handle observing the Big Dipper points northwest. This stage is usually in September of the lunar calendar, also called the full moon.