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.
The relative humidity in Oakland was 90% at 5 a.m. Thursday, according to the weather service. Jason Green, The Mercury News, 17 Oct. 2024 The heat index value, which represents how hot the air feels by taking into account relative humidity, could go as high as 112, according to the National Weather Service. The Arizona Republic, 26 July 2024 The heat index combines air temperature with relative humidity to provide a measure of what the temperature actually feels like to people. Doyle Rice, USA TODAY, 9 July 2024 Forecasters aren’t too concerned about fire danger, despite the warm temperatures, gusts and low relative humidity, because the rain from the weekend storm should keep risk relatively low. Summer Lin, Los Angeles Times, 6 May 2024 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

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 21 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

Last Updated: - Updated example sentences
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