What is the reason for the rain in the north for three or nine consecutive days?

It rained for three or nine days in the north because the cold air intensity was weak and the temperature was high since June+10 in 5438.

"Sanjiu" usually refers to the period from 19 to 27 days after the solar term "Winter Solstice Day", which is about 65438+ 10/9 to 17. There is a folk proverb in the north: "It was February 39 when I was slightly cold, and I was shivering with cold", but this year's "March 9" was very warm and even rained.

1.02 ~ 16.00, there was light rain in most parts of the province, moderate rain in northeast Dalian, and light rain turned to light snow in Montenegro and Changtu. Historically, a large-scale rainfall process occurred in Liaoning during the "March 9th" period of 1964. This rainfall process is very similar to 1964, which is rare in recent 60 years.

39-day introduction

Three or nine days refers to the third cold day since the winter solstice, which is the coldest period in a year. The specific calculation method is: from winter to Sunday, every "nine days" is counted as a "nine", the first nine days are called "one nine", the second nine days are called "two nine", and so on, and the coldest period in a year is "three nine days, four nine days". Count to "999" 81 days, "nine peach blossoms bloom". At this time, the cold has passed and the weather is warm.

The date of winter solstice is June 65438+February 2 1 to 23 in Gregorian calendar every year. From the date of winter solstice to 81 days, that is, the end of March in the solar calendar, it will be the time when "peach blossoms bloom" and "spring warms bloom". Because of China's vast territory, the climate varies greatly from place to place, not all over the country. Only some areas in China correspond to the number 9 "998 1 day, 900 peach blossoms, deep in spring and warm in the day".