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

Expect winds to be southwest 12 to 20 mph with gusts of 30 to 35 mph and humidity daytime humidities of 11 to 15%. — Ca Weather Bot, Sacbee.com, 23 Sep. 2026

The spike is thanks in part to Southern California’s sweltering summer, and record-breaking humidity coupled with extreme heat that’s being shepherded in by El Niño conditions in the Pacific. — Jack Dolan, Los Angeles Times, 23 Sep. 2026

It’s guaranteed to leave a smooth, humidity-resistant finish that holds up on muggy days and adds a ton of shine to dull and overworked strands. — Valeriya Chupinina, Vogue, 22 Sep. 2026

For those of us suffering in the ungodly heat and 400% humidity of the American South, sweater weather can't come soon enough. — Amber Harding Outkick, FOXNews.com, 22 Sep. 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