As nouns the difference between humidity and dryness
is that humidity is dampness, especially that of the air while dryness is a lack of moisture.
humidity
English
Noun
(en-noun)
dampness, especially that of the air.
the amount of water vapour in the air.
Derived terms
* absolute humidity
* relative humidity
* specific humidity
Related terms
* humid
* humidifier
* humidify
* dew point
* hygrometer
dryness
English
Noun
(uncountable) A lack of moisture.
The degree to which something is dry.