What is the outdoor fresh air density in Zhengzhou in summer?

In fact, the humidity and temperature are different every day, and the air density is also different. In addition, if the atmospheric pressure changes, the air density will also change greatly. Under normal circumstances, the air density in Zhengzhou is about 1. 1542kg/m when the relative humidity is 65 at normal atmospheric pressure and the temperature is 35 degrees. . At normal atmospheric pressure, it is about 20 degrees in spring and autumn, the relative humidity is 20, and the air density is about1.1691kg/m? . It is sunny and dry in winter, the relative humidity 10, and the air density is about 1.2702kg/m at 0 degrees. . So the air density in Zhengzhou is very different. Generally speaking, it is high in winter and low in summer. The density in the air is high when there is little steam, and low when there is more steam.