Mildew rainy day, that is, rainy season, refers to the natural climate phenomenon of continuous rain in the middle and lower reaches of the Yangtze River, Taiwan Province Province, south-central Japan and south Korea. From the middle and late June to the first half of July every year. Because the rainy season happens to be the mature period of plums in the south of the Yangtze River, China people call this climate phenomenon "Meiyu", also called "Meiyu 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.

Hazards of rainy days

Although under normal circumstances, the intensity of rainstorm in Meiyu period is less than that in other systems such as typhoon, due to the frequent intersection of cold and warm air during this period, there are more opportunities for rainstorm and its duration is longer.

When the air pressure decreases and the humidity increases in rainy season, we should not only prevent mildew and moisture, but also pay attention to the disease signals sent by the body. In the rainy season, the temperature fluctuates greatly. In rainy days, the temperature is often 2℃-5℃ lower than usual, and there are many cases of catching cold as the temperature drops.