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 Scott Safechuck, a Santa Barbara Fire Department spokesman, said temperatures had reached 90 degrees and relative humidity was nine percent in the fire area as of last night. Bruce Haring, Deadline, 7 July 2024 The temperature in Baltimore Friday afternoon reached 97 degrees, with a heat index of 105, which measures air temperature and relative humidity to determine what the temperature feels like to the body, according to the National Weather Service. Dana Munro, Baltimore Sun, 5 July 2024 Pay attention to the heat index The heat index is a number that combines air temperature with relative humidity to reflect what a hot day actually feels like to your body. Michelle Deal-Zimmerman, Baltimore Sun, 21 June 2024 In New York, the maximum heat index — which combines temperature with relative humidity — was predicted to hover around 100 in some places on Wednesday. Joe Hernandez, NPR, 19 June 2024 See all Example Sentences for relative humidity 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'relative humidity.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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 15 Jul. 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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