Finding out About Humidity
Some places on Earth have extremely high humidity. Places such as the equatorial rainforests can have air that is almost saturated with water during certain times of day and year.

Other parts of the world can have under 3% humidity such as inland parts of hot dry deserts. Rainfall is, as a result, very limited.

Humidity Changes you can Track
It is interesting to compare the humidity of the air before, during and after a storm.