relative humidity

noun

: the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature

Examples of relative humidity in a Sentence

Recent Examples on the Web

Like the weather stations at airports, mesonets measure things like air temperature and relative humidity, air pressure, rainfall or melted snow, and wind speed and direction – often every five minutes. —Chris Vagasky, The Conversation, 28 Apr. 2026

To answer this question, CPC researchers examined reports from weather stations throughout the state, developing averages by year for rainfall, snowpack, temperature, relative humidity, dew point, and vapor pressure deficit. —Edward Ring, Oc Register, 25 Apr. 2026

At the same time, forecasters anticipate that relative humidity values in the region will sink down to single-digit values, meaning the air will be very dry. —Emily Mae Czachor, CBS News, 23 Apr. 2026

The combination of low relative humidity and breezy winds will lead to an elevated fire risk. —Nc Weather Bot, Charlotte Observer, 22 Apr. 2026

Word History

First Known Use

1819, in the meaning defined above

Rhymes for relative humidity

• acidity
• aridity
• avidity
• cupidity
• fluidity
• liquidity
• lucidity
• morbidity
• placidity
• rancidity
• rapidity
• rigidity

Kids Definition

relative humidity

noun

: the amount of water vapor actually present in the air compared to the greatest amount possible at the same temperature

Medical Definition

relative humidity

noun

: the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature compare absolute humidity