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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
The Santa Anas often bring triple-digit temperatures and a relative humidity below 10%, leading to drier fuel that can ignite more easily.
—Ned Kleiner, Los Angeles Times, 27 Oct. 2024
The weather service predicted offshore winds of 25 to 35 mph with gusts up to 45 mph and daytime relative humidity as low as 10%, according to the weather service.
—Jason Green, The Mercury News, 16 Oct. 2024
In addition to the museum’s emergency staffing, preparations for Hurricane Milton included a full generator for its chiller plant, a type of centralized cooling system for buildings that would help maintain industry standards for temperature control and relative humidity.
—Karen K. Ho, ARTnews.com, 10 Oct. 2024
The heat index is calculated with a complex equation that factors in relative humidity and air temperature.
—Andrea Thompson, Scientific American, 1 Aug. 2024
See all Example Sentences for relative humidity
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Word History
First Known Use
1819, in the meaning defined above
Time Traveler
The first known use of relative humidity was
in 1819
Dictionary Entries Near relative humidity
Cite this Entry
“Relative humidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relative%20humidity. Accessed 16 Nov. 2024.
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
Britannica.com: Encyclopedia article about relative humidity
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