relative humidity


Definition of relative humidity

: 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 For example, fire weather conditions usually peak during the early afternoon when temperatures are typically their highest, wind speed will be at its maximum and most variable; and the relative humidity is generally at its lowest. Renny Vandewege, Forbes, 11 June 2021 Rainfall can help slow down an active fire, especially because the relative humidity increases. Kellie Hwang, San Francisco Chronicle, 30 June 2021 Fahrenheit, and the relative humidity often reaches a wilting 100%. Allison Duncan, WSJ, 16 June 2021 The greatest risk runs through midnight Wednesday, according to the National Weather Service, with winds of 15 to 25 mph and gusts up to 35 mph, and relative humidity as low as 12%. Scott D. Pierce, The Salt Lake Tribune, 8 June 2021 The National Weather Service reports that relative humidity values are expected to bottom out between 20-30% Thursday, and may fall into the teens Saturday. oregonlive, 15 Apr. 2021 Temperature, air pressure, relative humidity and distance to the ground were also factors. Ashley Strickland, CNN, 13 Apr. 2021 Temperatures in the high 80s and low relative humidity will elevate fire weather concerns through Monday, according to officials. oregonlive, 20 June 2021 The relative humidity in the desert could drop into single digits during the week. Gary Robbins, San Diego Union-Tribune, 12 June 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'relative 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 relative humidity

1819, in the meaning defined above

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Time Traveler for relative humidity

Time Traveler

The first known use of relative humidity was in 1819

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Dictionary Entries Near relative humidity

relative fugacity

relative humidity

relative impediment

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Statistics for relative humidity

Last Updated

20 Jul 2021

Cite this Entry

“Relative humidity.” Dictionary, Merriam-Webster, Accessed 28 Jul. 2021.

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More Definitions for relative humidity

relative humidity


Medical Definition of relative humidity

: 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 Encyclopedia article about relative humidity


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