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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Overnight relative humidity recovery will be moderate. Ca Wildfire Bot, Sacbee.com, 30 Aug. 2025 Critical thresholds are met at the North Rim when temperatures exceed 70 degrees, relative humidity is below 15%, wind gusts are over 15 mph and wind speeds surpass 10 mph, according to the fire management plan. Stephanie Murray, AZCentral.com, 28 Aug. 2025 Temperatures will peak in the 90s mid-week as relative humidities drop back into the single digits, meteorologist Julie Malingowski said during a Saturday night community meeting in Meeker. Lauren Penington, Denver Post, 18 Aug. 2025 What To Know The NWS on Monday implemented a red-flag warning across parts of Colorado, Idaho, Nevada, Utah and Wyoming amid concerns that strong winds, low relative humidity and warm temperatures could lead to fires across those states. Andrew Stanton, MSNBC Newsweek, 4 Aug. 2025 See All Example Sentences for relative humidity

Word History

First Known Use

1819, in the meaning defined above

Time Traveler
The first known use of relative humidity was in 1819

Browse Nearby Words

Cite this Entry

“Relative humidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relative%20humidity. Accessed 6 Sep. 2025.

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

More from Merriam-Webster on relative humidity

Last Updated: - Updated example sentences
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