Humidity
Humiditymeanswater vaporin theair,but not to liquid droplets infog,clouds,orrain.Desertsusually have low humidity, andtropicalregions have high humidity. Theword"humid" often means that the humidity is high, which gives the feeling of being very damp (wet air), stuffy, or even sweltering when thetemperatureis also high. When the humidity is low, the air can be said to be "not humid" or "dry."
Higher humidity reduces the effectiveness ofsweatingin cooling the body by reducing the rate of evaporation of moisture from the skin.
The term "relative humidity"is used to note theamountof humidity as apercent,from 0-100%.Meteorologistsusehygrometerstomeasurethe humidity in the air.
Humidity affects the rate ofevaporation.With a higher humidity, the rate of evaporation is less.