The question is a good example, but you could also say: "During a rainstorm the humidity of the air rises".
The humidity outside is high
a weather sentence usally
Because of the high humidity, the outside temperature felt much warmer than it actually was.
The high temperatures and humidity made Jack feverish.
humidity means the heat which leads to sweating
Relative humidity means the percentage of water vapor in the air compared to the total amount that could be contained. This is different at different temperatures. Here are a couple of sentences.The relative humidity is 10 percent.We studied relative humidity in class.
The humidity was so moist I was raining sweat (Hope that helps)
The humidity outside is very high.ORDuring the summer the humidity in the air is usually higher than in winter.
The air was so humid, I thought I would wilt. The humidity made the flowers quickly wilt.
The undesirable results were caused by the temperature and humidity. The parents considered the match to be undesirable and wanted him to leave.
My grandfather kept his cigars in a humidor.
The word "unmanageable" is an adjective meaning "difficult to control." i.e. "The high humidity rendered my hair unmanageable"