As an adjective muggy
is humid, or hot and humid.
As a noun humidity is
dampness, especially that of the air.
muggy
English
Adjective
(er)
humid, or hot and humid.
Synonyms
* (of the weather) , oppressive, sultry
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