humidity

noun

hu·​mid·​i·​ty hyü-ˈmi-də-tē 

yü-

plural humidities

: a moderate degree of wetness especially of the atmosphere compare relative humidity

Synonyms of humidity

• moisture

Examples of humidity in a Sentence

the humidity of the region

It's not the heat that will get you—it's the humidity.

The temperature is 67 degrees with humidity at 75 percent.

an area of low humidity

Recent Examples on the Web

Its core instrument, the Infrared Sounder, collects temperature profiles and humidity profiles. —Richard Tribou, The Orlando Sentinel, 22 Mar. 2026

Critical fire weather threat in the Plains Millions of people across the Plains are under red flag fire warnings on Sunday due to low humidity, warm temperatures, gusty winds and dry vegetation. —Kyle Reiman, ABC News, 22 Mar. 2026

The heat, low humidity and breezy winds in Colorado are raising the risk of wildfires across the state. —Denise Chow, NBC news, 22 Mar. 2026

Expect winds to be southwest around 15 MPH with gusts to 25 MPH and humidity between 15 and 25% in the afternoon. —Kansas City Star Weather Bot, Kansas City Star, 21 Mar. 2026

Word History

First Known Use

15th century, in the meaning defined above

Phrases Containing humidity

• absolute humidity
• relative humidity

Rhymes for humidity

• acidity
• aridity
• avidity
• cupidity
• fluidity
• liquidity
• lucidity
• morbidity
• placidity
• rancidity
• rapidity
• rigidity

Kids Definition

humidity

noun

hu·​mid·​i·​ty hyü-ˈmid-ət-ē 

yü-

plural humidities

: moisture, dampness

especially : the amount of moisture in the air

Medical Definition

humidity

noun

hu·​mid·​i·​ty hyü-ˈmid-ət-ē, yü- 

plural humidities

: a moderate degree of wetness especially of the atmosphere see absolute humidity, relative humidity