Introduction of first frost solar terms

Introduction of the first frost solar term: it is the eighteenth solar term among the twenty-four solar terms and the last solar term in autumn. Fight with your fingers; The longitude of the sun is 2 10.

Every year on Gregorian calendar1October 23-24 10, after entering the first solar term in first frost, the scene of late autumn is obvious, and cold air moves southward more and more frequently. The first frost does not mean "frost", but refers to the sudden drop in temperature and the large temperature difference between day and night. On the national average, "first frost" is the season with the largest temperature difference between day and night in a year.

In the first frost season, it's all over. From the morning, the sun went down to the ground, Yin Qi began to condense, and the first frost weather became colder and colder. Because "frost" is a manifestation of cold weather and large temperature difference between day and night, it is named after "first frost", which means "sudden drop in temperature and large temperature difference between day and night". The first frost solar terms are characterized by cold weather in the morning and evening, hot weather at noon, large temperature difference between day and night, and obvious autumn dryness. The first frost solar terms mainly include the customs of enjoying chrysanthemums, eating persimmons, climbing high and overlooking, and tonic.

Meteorological change

The "first frost" solar term is characterized by cold weather in the morning and evening, hot weather at noon, large temperature difference between day and night, and obvious autumn dryness. On the national average, the first frost is the season with the largest temperature difference between day and night in a year. After entering the first first frost solar term, the cold air activities affecting our country became more and more frequent, and the temperature difference between day and night increased rapidly, especially in Jiangnan and South China. Some areas in northwest and northeast China have shown the scene of "cold wind and fallen leaves" in early winter.

During the first frost period, from the end of June, which is usually 10, to the beginning of 1 10, with the dry and cold air gradually dominating the whole country, warm and humid air is marginalized, and many weather with the characteristics of summer and early autumn exits, and the weather is relatively simple. Before and after beginning of winter, strong winds often cool down, and some places enter winter in a short time.