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

Clearing right-of-way strips can result in the loss of trees and native vegetation; crackles, hisses and humming can be heard nearby especially during periods of high humidity; and farm fields and animal habitat can be affected by construction activities. —Madeline Heim, jsonline.com, 12 Dec. 2025

This can happen when damp clothes sit too long in the hamper or washer, when garments aren’t fully dried before being put away, or when they’re stored in spaces with poor ventilation or excess humidity. —Quincy Bulin, Southern Living, 12 Dec. 2025

Place a humidifier near your avocado tree or set it on a pebble tray with water create a pocket of higher humidity around the plant. —Lauren David, Better Homes & Gardens, 11 Dec. 2025

Sea vessels must operate in environments with high humidity and salinity. —Chris Young, Interesting Engineering, 9 Dec. 2025

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