hu·​mid·​i·​ty | \ hyü-ˈmi-də-tē How to pronounce humidity (audio) , yü- \
plural humidities

Definition of humidity

: a moderate degree of wetness especially of the atmosphere — compare relative humidity

Synonyms for humidity


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Examples of humidity in a Sentence

the humidity of the region It's not the heat that will get you—it's the humidity. The temperature is 67 degrees with humidity at 75 percent. an area of low humidity
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Recent Examples on the Web The reptiles were kept at a temperature and humidity as close as possible to their natural habitat, FOX 5 D.C. reported. David Aaro, Fox News, 21 Jan. 2022 The experts, who have already commissioned 3-D maps of the tombs, plan to carefully monitor how visitors’ presence affects the temperature and humidity, which have so far remained stable, with only seasonal variation. Julia Buckley, Smithsonian Magazine, 13 Jan. 2022 That means stacks of boxes will sit in your home for up to two weeks, so the wood can adjust to the temperature and humidity. Washington Post, 11 Jan. 2022 Strands of electrical lighting dangle from the ceilings and sheets of translucent plastic are still attached to the walls – the sheets enabled the mushroom growers to create just the right temperature and humidity for the cultivation of fungi. Nick Squires, The Christian Science Monitor, 4 Jan. 2022 Enlarge / Hooks printed with a photosensitive resin can be assembled together with electronics and sensors for light, temperature, and humidity. Jennifer Ouellette, Ars Technica, 27 Dec. 2021 Their study didn’t find much of a role for temperature or humidity, but suggested that case rates would go up in a particular area during periods of lower UV exposure. Rachel Gutman, The Atlantic, 20 Nov. 2021 Providing another spot indoors with light, temperature and humidity similar to its outdoor spot would work too. Tom Maccubbin,, 20 Nov. 2021 Under the right temperature and humidity conditions, ice forms on a branch surface while water stays liquid inside the wood’s pores. Leslie Nemo, Scientific American, 19 Nov. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'humidity.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of humidity

15th century, in the meaning defined above

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Time Traveler for humidity

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The first known use of humidity was in the 15th century

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Statistics for humidity

Last Updated

24 Jan 2022

Cite this Entry

“Humidity.” Dictionary, Merriam-Webster, Accessed 25 Jan. 2022.

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More Definitions for humidity



English Language Learners Definition of humidity

: moisture in the air : the amount of moisture in the air


hu·​mid·​i·​ty | \ hyü-ˈmi-də-tē How to pronounce humidity (audio) , yü- \
plural humidities

Kids Definition of humidity

: the degree of wetness especially of the atmosphere


hu·​mid·​i·​ty | \ hyü-ˈmid-ət-ē, yü- How to pronounce humidity (audio) \
plural humidities

Medical Definition of humidity

: a moderate degree of wetness especially of the atmosphere — see absolute humidity, relative humidity

More from Merriam-Webster on humidity

Nglish: Translation of humidity for Spanish Speakers

Britannica English: Translation of humidity for Arabic Speakers Encyclopedia article about humidity


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