Huangmei refers to

Meiyu, also known as Huang Meiyu, is a warm and humid air current in the Pacific Ocean brought by the southeast monsoon during the two solar terms in June and July every year, passing through the middle and lower reaches of the Yangtze River and Taiwan Province Province in China. In rainy season, the air humidity is high, the temperature is high, and clothes are easy to get moldy, so it is also called "mildew rain".

Proverb:

There is a folk proverb circulating in the middle and lower reaches of the Yangtze River, "It thunders in summer, and it is Huangmei when it turns upside down". It is said that after the rainy season has passed, if it thunders in summer, the rainy season will be turned upside down again.

It usually takes one or two weeks to pour Huangmei, and it usually turns sunny and hot after the end, so there is also the saying that "the summer is not sunny, and the summer is full of stones".