When is the rainy season in Shanghai?

The average plum blossom time in Shanghai is in mid-June.

For example, on June 12, 2022, Shanghai officially entered Mei, and the Mei rainy season is a climate phenomenon of continuous rain in June and July every year. Because this solar term is the maturity of plums in Jiangnan, it is called Meiyu. In the rainy season, Shanghai residents are likely to encounter rising temperatures and showers, so remember to pay attention to the weather information before going out.

According to the information of China Weather Network, from June 5 to 17, 2022, Shanghai was located at the northern edge of the rain belt, with cloudy weather and thunderstorms in the afternoon, and the highest temperature further rose to around 30℃. From June 18 to June 2 1 day, 2022, with the main rain belt moving northward to the lower reaches of the Yangtze River, Shanghai was rainy and rainy, accompanied by lightning activities. The temperature is stable, between 24-30℃.

Formation conditions of rainy season:

1. There is blocking high pressure or stable high pressure ridge in the middle troposphere in high latitudes of Asia, and the atmospheric circulation is relatively stable with little change.

2. The westerly circulation in the mid-latitude area is gentle, and frequent short-wave activities provide cold air conditions for the Jianghuai area.

3. The western Pacific subtropical high has an obvious process of extending westward and jumping northward. The ridge line of the 500 HPA subtropical high is stable between 20 and 25 degrees north latitude, and the warm and humid air flow is transported from the edge of the subtropical high to the Jianghuai basin. Under this circulation condition, Meiyu front lingers in the Jianghuai basin, often accompanied by southwest vortex and shear line, and the mesoscale system on Meiyu front is active. It not only maintains the continuous precipitation during the Meiyu period, but also provides abundant water for the rainstorm.