What is the average relative humidity in Nanjing in winter?

The average relative humidity in winter in Nanjing is 73%.

Extreme weather, such as fog, approaches 100%, which is basically saturated.

The average is 73%, and you can think about more than 60% of the days, basically. (Note: If the indoor temperature is high, the relative humidity will be low, which means you won't feel uncomfortable indoors. )

The average relative humidity in winter in Zhengzhou is 60%. (Note: High relative humidity does not mean high water vapor content, and there is another concept called moisture content. )

Extreme weather, such as fog, approaches 100%, which is basically saturated.

About 50% of the days, the humidity exceeds 60%. The average is 60%.

The average relative humidity in Tieling in winter is 69%.

Extreme weather, close to 100% saturation.