When is the rainy season in Shanghai? How long will it last?

The rainy season in Shanghai is usually from mid-June to early July in the solar calendar every year.

The typical plum rain in Shanghai generally "blooms" from early June to mid-June, and blooms from early July to mid-July. Meiyu refers to the rainy days before plum blossom, which generally starts in mid-June and lasts for about half a month.

In China's almanac, it is recorded that plum rains began and lasted all day: the first day was called "entering plum blossoms" and the last day was called "leaving plum blossoms". Plum blossoms are planted on the first day after awning, which is the first before sunrise in Xia Hou.

The total time of plum blossom is between June 6th and 15, and the total time of plum blossom is between July 8th and 19. There is an obvious rainy season in eastern China, with a long rainy period and relatively concentrated rainfall, which is caused by the displacement of the main rain belt from east to west to north, and is a unique phenomenon of the turning point of the atmospheric circulation in East Asia at the turn of spring and summer.

Extended data:

Meiyu season is a warm and humid air flow in the Pacific Ocean brought by the southeast monsoon in June and July every year, which passes through the middle and lower reaches of the Yangtze River in China, Taiwan Province Province, south-central Japan and south Korea. Because it is now the mature period of plums in Jiangnan, it is called Meiyu season.

At present, the academic circles believe that the East Asian summer monsoon began in the South China Sea summer monsoon (in late May on average) and belongs to the category of tropical southwest monsoon. The summer monsoon in the South China Sea gradually strengthens northward, and it is carried northward to the middle and lower reaches of the Yangtze River during the meiyu period, where it merges with the subtropical southwest monsoon on the northwest side of the subtropical high, cold air and wind speed to form the meiyu belt.

In the rainy season, the air humidity is high and the temperature is high, so clothes are easy to get moldy, so some people call the rainy season "moldy rain". After the rainy season, the weather began to be dominated by the Pacific subtropical high and officially entered the hot summer.

Baidu Encyclopedia-Meiyu Season