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

Despite reasonable humidity values (dew points in the upper 60s), heat indexes will be over 100 degrees by the afternoon, with some locations probably reaching heat advisory levels. Greg Porter, Washington Post, "PM Update: Clear, mild and comfortable tonight. Quite hot with increasing humidity this weekend.," 29 June 2018 On all of those days, dew points of 60 or more and readings near 100 on the heat indices will make things just a touch more miserable., "It’s official — Boston is sweating a heat wave," 1 July 2018 The high dew points and recent plethora of rain will likely result in widespread areas of fog by Sunday morning. Greg Porter, Washington Post, "PM Update: Warm and humid tonight with a decrease in rain chances. Partial sunshine and warm temperatures return for Sunday.," 19 May 2018 Computer software receives weather data and alters fog flow to suit wind speeds, dew point, temperature, and humidity. Graham Ambrose,, "‘Fog sculptures’ to adorn Emerald Necklace," 24 June 2018 With record high temperatures and dew points in the 70s, dangerous heat index values in excess of 105 degrees are expected Sunday. Tom Skilling,, "Excessive heat, record highs expected Sunday," 16 June 2018 Memphis hit 91 degrees around noon, and the dew point was 75, leading to oppressive humidity. Greg Porter, Washington Post, "This mesmerizing storm makes it look like a bomb went off over Memphis last night," 13 July 2018 Tropical dew points really amplify the temperatures around 90 to perhaps mid-90s. A. Camden Walker, Washington Post, "D.C.-area forecast: Un-muggy heat through tomorrow, but then we turn steamy and wetter into next week," 13 July 2018 Riding a modest southeast wind flow, dew points rose as high as 78 at Peru and 77 at Morris and Joliet. Tom Skilling,, "Steamy Fourth could feature natural fireworks," 3 July 2018

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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Statistics for dew point

Last Updated

7 May 2019

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Time Traveler for dew point

The first known use of dew point was in 1826

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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

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More from Merriam-Webster on dew point

Rhyming Dictionary: Words that rhyme with dew point

Spanish Central: Translation of dew point

Nglish: Translation of dew point for Spanish Speakers

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