When will the rainy season in Guangzhou end?

Meiyu, also known as Huangmeitian, refers to the cloudy and rainy natural climate phenomenon in the middle and lower reaches of the Yangtze River in China, Taiwan Province Province in China, south-central Japan and South Korea every year from the middle and late June to the first half of July. Because plum rains occur when plums are ripe in the south of the Yangtze River, China people call this climate phenomenon "plum rains" or "plum rains season". During the rainy season, the air humidity is high, the temperature is high, and clothes are easy to get moldy, so some people call the rainy season "moldy rain" with the same sound.

Every year from late May to early June, cold air from the north and warm air from the south meet in South China, forming a quasi-static front in South China. By the end of June, the influence of warm air was strengthened, and the quasi-static front moved northward to Jianghuai area, becoming the quasi-static front of Jianghuai (also known as Meiyu front). Because the warm air from the south carries a lot of water vapor, when it meets the cold air mass, it will produce a lot of convection activities. Because the cold and warm air forces are similar during this period, the front stays in the Jianghuai area.

To put it simply, it is related to the subtropical high in the western Pacific: during the rainy season, the cold air in the north often goes south, and the warm and humid airflow in the southwest goes deep into the north, and the cold and warm air meet, generally forming a rain belt. In normal times, it will be fine if it rains, but it happened that the western Pacific subtropical high system moved northward and pushed this rain belt to the above areas.

Meiyu mainly occurs in the middle and lower reaches of the Yangtze River in China, Taiwan Province Province in China, the southern tip of the Korean Peninsula and south-central Japan in the subtropical monsoon climate zone, while there is no Meiyu in other parts of the world at the same latitude. Although there is no obvious phenomenon of plum rain in South China, the influence of plum rain is also great.