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

Temperatures between 70°F and 85°F and plenty of humidity are key for bud break. —Barbara Gillette, The Spruce, 8 Feb. 2026

Sea buckthorn oil helps prevent breakage, while saffron smooths the hair cuticle to minimize frizz and fight humidity. —Sarah Hoffmann, Allure, 7 Feb. 2026

High humidity from warm water creates moisture that lingers on shower surfaces. —Madeline Buiano, Martha Stewart, 7 Feb. 2026

High humidity, caused by poor air circulation, can lead to mold and mildew growth in your home. —Sophia Beams, Better Homes & Gardens, 7 Feb. 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