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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
Meanwhile, relative humidity was quite dry, as low as 5%.
—Richard Winton, Los Angeles Times, 10 Dec. 2024
Wind gusts are forecast to climb to 60 to 80 mph and relative humidity could fall to 2% to 15% Monday night through Tuesday night.
—Max Golembo, ABC News, 9 Dec. 2024
The relative humidity during the daytime could be as low as 15%.
—Rick Hurd, The Mercury News, 4 Nov. 2024
Past studies on former World Cup venues have highlighted the negative effects for players who compete in high relative humidities, including in Brazil in 2014.
—Julia Jacobo, ABC News, 28 Nov. 2024
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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 24 Dec. 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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