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
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The Lilac fire — which began north of West Lilac Road, just west of Interstate 15 — was burning in an area where the relative humidity is very low. Gary Robbins, San Diego Union-Tribune, 21 Jan. 2025 In addition to gusty winds, relative humidity will be very low, down to 8%. Max Golembo, ABC News, 15 Jan. 2025 Typically, this means winds must be at least 35 miles per hour, the relative humidity must be below 20 percent, and dry fuels must be present. Michael Gfoeller and David H. Rundell, Newsweek, 15 Jan. 2025 Red flag warnings alert residents to dangerous fire weather as measured by winds of at least 20 mph and relative humidity of 25% or less, according to the weather service. Alexandra Marquez, NBC News, 13 Jan. 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

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 Jan. 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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