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 critical fire conditions are a result of warm temperatures combined with strong winds in excess of 15 mph and relative humidity of 25% to 30%. Kathryn Prociv, NBC news, 26 Mar. 2025 Still, relative humidity values are expected to fall below 25 percent outside of the mountains and around 25 percent in the mountain valleys, with higher values in the higher elevations. Nc Weather Bot, Charlotte Observer, 23 Mar. 2025 Massive walls of dust that forced highway closures and resulted in power outages across New Mexico on Tuesday had blown through by Wednesday, but forecasters warned that wind speeds will pick up and relative humidity levels will drop, making way for critical fire weather conditions Thursday. arkansasonline.com, 19 Mar. 2025 Strong winds and low relative humidity will also impact North Texas this week, with the National Weather Service Fort Worth saying there’s an elevated to critical fire threat over the next few days. Brayden Garcia, Fort Worth Star-Telegram, 18 Mar. 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

Browse Nearby Words

Cite this Entry

“Relative humidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relative%20humidity. Accessed 21 Apr. 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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