28 g of water per cubic metre of air at 30 °C

Three primary measurements of humidity are widely employed: absolute, relative, and specific. Absolute humidity is the mass of water vapor per volume of air (in grams per cubic meter). Relative humidity, often expressed as a percentage, indicates a present state of absolute humidity relative to a maximum humidity given the same temperature. Specific humidity is the ratio of water vapor mass to total moist air parcel mass.

Humidity

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