Arafed road in the snow with a sunset in the background

Frost，It is the last solar term of autumn。Fighting fingers；The solar ecliptic longitude is 210°；It is celebrated on October 23-24 of the Gregorian calendar every year。Frostfall does not mean "frost"，Instead, it signifies a sharp drop in temperature、There is a large temperature difference between day and night。Frost season，Everything is done，Finished in the end，The sun goes down to the ground，Yin qi begins to condense，The cold weather begins with frost。After the frost falls on the solar term，The late autumn scene is obvious，Cold air moving south is becoming more frequent。In terms of national averages，Frost，It is the time of year when the temperature difference between day and night is greatest。The frost solar term is characterized by colder weather in the morning and evening、It is hotter at noon，There is a large temperature difference between day and night，Autumn dryness is obvious。 Frost does not mean that it will "frost" when entering this solar term，In fact, "frost" did not fall from the sky，"Frost" is the condensation of water vapor on the ground due to temperature changes and cold air，The "frost fall" solar term has nothing to do with "frost fall"，The two are not the same concept。Frostfall does not mean "frost"，Instead, it signifies a sharp drop in temperature、There is a large temperature difference between day and night。There is no concept of "frostfall" in meteorology，In meteorology, the first frost that appears in autumn is generally referred to as "early frost" or "first frost"，The last frost that appears in spring is called "night frost" or "final frost"；The interval period from the final frost to the first frost，It is the frost-free period，"Frost" usually appears in autumn、Winters、Spring three seasons

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