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 The forecast for kickoff calls for a 90-degree temperature with a relative humidity of 62 percent to produce a feels-like 102-degree game. Mark Inabinett |, al, 10 Sep. 2022 The temperature near the fire Thursday was 90 degrees with relative humidity of 30% to 35% and winds of 5 to 8 mph with gusts up to 15 mph, according to the National Weather Service in Oxnard. Gregory Yee, Los Angeles Times, 26 Aug. 2022 Temperatures will be in the 90s, with relative humidity in the 20-30% range, CNN meteorologist Robert Shackelford said. Aya Elamroussi, CNN, 14 July 2022 The relative humidity will climb into the 80-percent-plus range at area beaches. Gary Robbins, San Diego Union-Tribune, 13 Aug. 2022 For example, if the relative humidity reaches 70 percent and the temperature is 90 degrees, the heat index will be 105. Jordan D. Brown, USA TODAY, 19 July 2022 Red flag warnings are up for a wide swath of Texas and Oklahoma, where relative humidity could fall below 25 percent and winds may gust up to 30 mph. Matthew Cappucci, Washington Post, 19 July 2022 Winds will be gusty, up to 35 mph and the relative humidity will drop to as low as 6%. Meredith Deliso, ABC News, 9 July 2022 Temperatures during the day were above 96 degrees, relative humidity was below 10% and winds of at least 8 mph were blowing out of the southwest. Gregory Yeestaff Writer, Los Angeles Times, 28 June 2022 See More

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.

First Known Use of relative humidity

1819, in the meaning defined above

Learn More About relative humidity

Time Traveler for relative humidity

Time Traveler

The first known use of relative humidity was in 1819

See more words from the same year

Dictionary Entries Near relative humidity

relative fugacity

relative humidity

relative impediment

See More Nearby Entries 

Statistics for relative humidity

Last Updated

18 Sep 2022

Cite this Entry

“Relative humidity.” Dictionary, Merriam-Webster, Accessed 29 Sep. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

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


Test Your Vocabulary

The Great British Vocabulary Quiz

  • union jack speech bubble
  • Named after Sir Robert Peel, what are British police called?
True or False

Test your knowledge - and maybe learn something along the way.

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!