Humidity is the concentration of water vapor in the air.

The concentration can be expressed as absolute humidity, specific humidity, or relative humidity.

Relative humidity is the most frequently encountered measurement of humidity because it is regularly used in weather forecasts.

It’s an important part of weather reports because it indicates the likelihood of precipitation, dew, or fog.

Higher relative humidity also makes it feel hotter outside in the summer because it reduces the effectiveness of sweating to cool the body by preventing the evaporation of perspiration from the skin.

This effect is calculated in a heat index table..

For more information about the topic Humidity, read the full article at Wikipedia.org, or see the following related articles:

Dew point — The dew point or dewpoint of a given parcel of air is the temperature to which the parcel must be cooled, at constant barometric pressure, for the ...  > read more

Fog — Fog is a cloud in contact with the ground. Fog differs from other clouds only in that fog touches the surface of the Earth. The same cloud that is ...  > read more

Precipitation (meteorology) — In meteorology, precipitation is any form of water that falls from the sky as part of the weather to the ground. This includes snow, rain, sleet, ...  > read more

Evaporation from plants — Evapotranspiration (ET) is the sum of evaporation and plant transpiration. Evaporation accounts for the movement of water to the air from sources ...  > read more

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