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

In the extreme risk area, sustained winds of 25 to 35 mph and gusts up to 55 mph are forecast with relative humidity values dipping into the single digits. — Kyle Reiman, ABC News, 27 June 2026

From Sunday, June 21 through Thursday, June 25 morning, Pittsburgh's dew point — or the temperature the air must be cooled to in order to reach a relative humidity of 100% — has ranged from the upper 40s to just shy of 70, according to The Pennsylvania State Climatologist. — Finch Walker, USA Today, 25 June 2026

Winds are expected to be southwest 15 to 30 mph with gusts up to 45 mph and relative humidity as low as 5%. — Ca Weather Bot, Sacbee.com, 25 June 2026

In Colorado, the southwestern corner of the state was under a red-flag warning issued by the National Weather Service until Monday, due to gusty winds and low relative humidity. — Valerie Gonzalez, Los Angeles Times, 22 June 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