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

This Mediterranean herb likes the heat but not the humidity, so make certain to plant it in full sun in sandy or gravelly soil. —Michelle Darrisaw, Southern Living, 1 Mar. 2026

The warmer water also increases evaporation, raising moisture content in the air (aka humidity). —Zoe Mintz, CBS News, 28 Feb. 2026

Lightweight cottons and linens feel airy and relaxed, while washable blends are practical in a space consistently exposed to cooking splatter, splashes, and humidity. —Wendy Rose Gould, Martha Stewart, 27 Feb. 2026

When exposed to moisture, including indoor humidity, powder detergent clumps and harden, rendering it unusable. —Jolie Kerr, Better Homes & Gardens, 27 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