Why is humidity measured in %?

Humidity is reported in a number of different ways: Relative Humidity is the ratio of the amount of water vapor present in the air compared to the maximum amount of water vapor that the air can hold. read more

Absolute humidity (units are grams of water vapor per cubic meter volume of air) is a measure of the actual amount of water vapor in the air, regardless of the air's temperature. The higher the amount of water vapor, the higher the absolute humidity. read more

· Specific humidity is a measure of the weight of water vapor contained in a unit of weight expressed in the metric system as grams per kilo of air. · Relative humidity is expressed as a percentage of the amount of water vapor air is holding compared to the amount it can hold at a specific temperature. read more

Absolute humidity is the water content of air expressed in gram per cubic meter or grams per kilogram. Relative humidity, expressed as a percent, measures the current absolute humidity relative to the maximum (highest point) for that temperature. Specific humidity is the ratio of the mass of water vapor to the total mass of the moist air parcel. read more