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

Bright light, lower humidity, and warmer temperatures can cause soil to dry out more quickly, requiring more frequent watering. —Karen Brewer Grossman, Southern Living, 5 Apr. 2026

Its core instrument, the Infrared Sounder, collects temperature profiles and humidity profiles. —Richard Tribou, The Orlando Sentinel, 4 Apr. 2026

The National Weather Service reported northeast winds of about 18 mph were blowing in Acton when the fire erupted, with temperatures around 65 degrees and 15% humidity. —City News Service, Daily News, 4 Apr. 2026

Some types of seeds require a glass or plastic cover to provide supplemental humidity. —Tim Johnson, Chicago Tribune, 4 Apr. 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