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

Fortunately, the wildfire threat will ease by Sunday as winds shift to a more southerly direction and humidity increases across the region. —Newsroom Meteorologist, Austin American Statesman, 3 Jan. 2026

These tiny organisms survived blasts of radiation, intense chemical scrubbing, and near-zero humidity. —Mrigakshi Dixit, Interesting Engineering, 2 Jan. 2026

Fluctuations in temperature and humidity can also cause rust and corrosion. —Brandee Gruener, Southern Living, 2 Jan. 2026

Summer nights, by contrast, tend to hang onto humidity, leaving the sky hazy and washed out. —Michael D'estries, Travel + Leisure, 1 Jan. 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