When does rainy day 2022 start and end?

The rainy season begins on June 12, 2022 and ends on July 16, 2022.

Meiyu period is generally in two solar terms, namely, grain sowing and off-season. The calculation method of ancient Meiyu period is that the first "three days" after the solar term of grain planting is the time of plum blossom, and the first "non-day" after the solar term in summer is the time of plum blossom. Therefore, the rainy season in 2022 is from June 12 to July 16.

Seasonal causes of plum rain

Every year from late April to early May, 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 May, 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 of the equal influence of cold and warm air during this period, the front stays in Jianghuai area.

Typical plum rains generally "enter plum blossoms" in the middle and late June, and bloom in early to mid-July. Meiyu refers to the rainy days before plum blossom, which generally starts in mid-April and lasts for about half a month.