In the poem, it rains at home in Huangmei season. Where did it happen in China?

Early summer, China Jianghuai Valley (Central and South China), Taiwan Province Province.

Meiyu (Huangmeitian) refers to the cloudy and rainy natural climate phenomenon in the middle and lower reaches of the Yangtze River, Taiwan Province Province, south-central Japan and south Korea every year from late June to early July. Because plum rains occurred in the mature period of plums in the south of the Yangtze River, people in China call this climate phenomenon "plum rains", and this period is also called "plum rains season". 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 in Central China, South China, Taiwan Province Province and other places began to be dominated by the Pacific subtropical high, and officially entered the summer heat.

(Baidu Encyclopedia)