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 Researchers have found that various weather factors such as wind, dew point, wet-bulb temperature, precipitation, and cloud cover all affect running performance to some degree, but none of them have more influence than air temperature. Greg Hosier, Outside Online, 2 Aug. 2019 Classic early fall — low dew point/moisture, clear skies and minimal winds. Washington Post, 30 Sep. 2021 Expect a good chance of 90 F. today, followed by a drop in dew point and humidity levels tomorrow before another spike on Sunday. Paul Douglas, Star Tribune, 10 June 2021 And while the winds and temperatures were certainly outside the normal for Wisconsin, the dew point was also shockingly high — 58 in Madison. Laura Schulte, Milwaukee Journal Sentinel, 17 Dec. 2021 Saturday looks close to 90 [degrees], but instead of having the dew point in the low 70s, its going to be in the 60s. Jessika Harkay,, 12 Aug. 2021 Other indicators of the extent to which humidity seemed to create torpor and clog our atmosphere include the dew point. Washington Post, 17 July 2021 The key factors were the unseasonably warm temperatures and higher-than-usual levels of humidity for this time of year (the dew point in Milwaukee Friday at first pitch was 61 degrees) combined with sunshine. Andrew Wagner, Forbes, 9 Oct. 2021 The dew point — a measure of humidity in the atmosphere — is expected to remain in the 70s, which will make for oppressive conditions. Zach Murdock,, 11 Aug. 2021 See More

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.

First Known Use of dew point

1826, in the meaning defined above

Buying Guide

Our Reviews team has selected the best smart thermostats.

Learn More About dew point

Time Traveler for dew point

Time Traveler

The first known use of dew point was in 1826

See more words from the same year

Dictionary Entries Near dew point

dew plant

dew point

dew-point hygrometer

See More Nearby Entries 

Statistics for dew point

Last Updated

13 Apr 2022

Cite this Entry

“Dew point.” Dictionary, Merriam-Webster, Accessed 18 May. 2022.

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

More Definitions for dew point

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


Test Your Vocabulary

Name That Food

  • a-light
  • Name these cookies!
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

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!