Humidity is the concentration of water vapor present in the air. It indicates the likelihood for precipitation, dew, or fog to be present. Humidity depends on specific humidity, which is the ratio of water vapor mass to total moist air parcel mass, and absolute humidity, which is the total mass of water vapor present in a given volume or mass of air. Humid air is less dense than dry air, and humans are sensitive to humid air due to its impact on evaporative cooling and heat exchange efficiency. People can be comfortable within a wide range of humidities depending on the temperature, ideally between 40% and 60% relative humidity
. Humid is used to describe an atmosphere or climate that is very damp and usually very hot, containing a high amount of water or water vapor, and noticeably moist
. When there is a lot of moisture in the air, it is humid, and people often say that it's not the heat that bothers them, it's the humidity, as humid air makes the heat feel hotter and affects hair texture
