dew point


Definition of dew point

: the temperature at which a vapor (such as water) begins or would begin to condense

Examples of dew point in a Sentence

It's 78° outside and the dew point is 63°.
Recent Examples on the Web The rate of snowmelt depends on many different factors, including temperature, dew point, cloud cover, time of year, wind speed. Jonathon Berlin,, "How fast is the snow going to melt? What are the flooding concerns? We asked the experts.," 24 Feb. 2021 Through tonight: Temperatures and dew point values will bottom out in the low 30s overnight, which means widespread areas of fog are likely to develop. Washington Post, "PM Update: Fog and slippery spots develop overnight," 20 Dec. 2020 The basic station plot shows temperature, dew point, wind direction, wind speed, cloud cover, precipitation, and air pressure, which are all measured at weather stations around the globe. Dennis Mersereau, Outside Online, "How to Read a Surface Weather Map," 15 Oct. 2020 The dew point that reached into the low- and mid-60s statewide on Wednesday afternoon will be more comfortable Thursday in central and northern portions of the state with readings in the mid to upper 50s., "Unseasonably mild temperatures for Thursday," 21 Oct. 2020 Humidity will be building back into the state this weekend as the dew point climbs into the low and mid-60s., "Sunny with temps in the 70s and lower 80s on Thursday," 23 Sep. 2020 The units for temperature and dew point depend on the source that made the map; most surface maps issued in the United States use Fahrenheit, while organizations in most other countries use Celsius. Dennis Mersereau, Outside Online, "How to Read a Surface Weather Map," 15 Oct. 2020 Noticeably drier air will settle into the region overnight with the dew point dropping through the 50s and into the 40s by Wednesday morning., "Thunderstorms on Tuesday could produce damaging winds," 24 Aug. 2020 Morning clouds Sunday morning will give way to a mix of clouds and sun in the afternoon with highs near 80 and the dew point will be in the mid to upper 60s., "Humidity will increase on Saturday," 25 Sep. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'dew point.' 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 dew point

1826, in the meaning defined above

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The first known use of dew point was in 1826

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Last Updated

8 Mar 2021

Cite this Entry

“Dew point.” Dictionary, Merriam-Webster, Accessed 8 Mar. 2021.

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More Definitions for dew point

dew point


English Language Learners Definition of dew point

technical : the temperature at which the moisture in the air forms visible drops of water : the temperature at which dew forms

dew point


Kids Definition of dew point

: the temperature at which the moisture in the air begins to turn to dew

More from Merriam-Webster on dew point

Nglish: Translation of dew point for Spanish Speakers

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