From what month to what month is Huangmeitian?
Huang Meitian is from mid-June to mid-July.
Huangmeitian means plum rainy weather. In early summer, a period of long-lasting gloomy and rainy weather often occurs in the middle and lower reaches of the Yangtze River. At this time, utensils are prone to mold, so it is called "mold rain", or "mold" for short. It is also the time when the plums in the south of the Yangtze River are yellow and ripe, also known as "plum rain" or "yellow plum rain".
Chinese almanacs always have records of the beginning and end of mildew rain: the beginning day is called "mildew entering" and the end day is called "mildew coming out". Mold will appear on the first C day after the Ear seeds are planted, and mold will appear on the first day after the Slight Heat. The onset of mildew is always between June 6th and 15th, and the onset of mildew is always between July 8th and 19th.
Eastern China has an obvious rainy season with a long rain period and relatively concentrated rainfall. It is caused by the north-south displacement of the main rain belts that are generally east-west. It is unique to the East Asian atmospheric circulation during the seasonal transition between spring and summer. Phenomenon. After mid-June, the rain belt remains in the Yangtze-Huaihe River Basin, which is the Meiyu period. The residence time of the rain belt is called the "Meiyu season". The day at the beginning of the Meiyu season is called "Meiyu season" and the day at the end is called "Meiyu season".
Extended information
There are many folk proverbs related to plum rain in the middle and lower reaches of the Yangtze River in China.
"Sanjiu owes the east wind, and Huangmei does not have heavy rain." "Sanjiu" refers to January 9-17 of the Gregorian calendar, and "Huangmei" refers to the solar term of Ear Grain (June 6-20). The meaning of this proverb is that if there is no east wind blowing during the March 9th period, or there is very little east wind, the rainfall during the Mangzhong solar term will also be less.
"If all the peach blossom water is exhausted, it must be dry yellow plum blossoms." "Peach blossom water" refers to the precipitation during the Qingming solar term or during the peach blossom blooming period in April. "Dry Huangmei" refers to the lack of plum rain or the late start of plum rain in the Ear solar term. In the lower reaches of the Yangtze River, if there is more rain during the Qingming Festival or April when the peach blossoms are blooming, commonly known as "peach blossom water", the plum rain will be less during the Egzhong solar term, or the plum rain will start later.
"Xiaoman is dissatisfied, Huangmei doesn't care", which indicates that there is a positive correlation between rainwater between Xiaoman and Mangzhong solar terms, that is, if there is less rain in Xiaoman solar term, it means that there will be less rain in Mangzhong solar term, or Huangmei is late.
This is because the Xiaoman solar term coincides with the turn of spring and summer. If there is less rain during this period, it reflects that the subtropical high force is weak and its location is southward. During the Mangzhong solar term, the subtropical high force is generally not very strong. It is rapidly intensifying. Even if it has a certain intensity, the southwest airflow on its northern edge will not extend to the lower reaches of the Yangtze River, so there will be less rain in the lower reaches of the Yangtze River during the Mangzhong solar term.
In the lower reaches of the Yangtze River, the precipitation in the Xiaoman solar term is also called "Dry Huangmei", the precipitation in the Mangzhong solar term is called "Zhenghuangmei", and the precipitation in the Summer Solstice solar term is called "Sweet Huangmei". Therefore, when there is less rain in Ear Grain or when the plum rain starts late (it does not start until the summer solstice), it is called "Huang Mei Guan".
Baidu Encyclopedia-Huang Meitian