Should I close the window at home in rainy days?

1. Close the window at home in rainy days. The humidity in the house is mostly due to the "moisture regain" of the weather. The phenomenon of "moisture regain" is manifested in the obvious increase of humidity in the air, which makes food, clothing, furniture and other items moldy. People who live in humid rooms for a long time are prone to diseases such as rheumatism, or make rheumatic patients ill or aggravate their illness.

2. Hui Nan Tian (Hui Nan for short) is a weather phenomenon in the south of China, which usually refers to the phenomenon that the temperature starts to get warmer and the humidity starts to rise every spring. South China belongs to a typical maritime subtropical monsoon climate. Therefore, from March to April every year, warm and humid air from the South China Sea in China meets cold air from the north of China, forming a quasi-static front in Lingnan, which makes the weather in South China changeable and very humid, with light rain or fog in between, resulting in the phenomenon of returning to the south. Some cold objects begin to condense after encountering warm and humid airflow, forming water droplets on the surface of the objects.

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