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

Store limes in your fridge’s crisper drawer, which has a lower humidity level that keeps the skins from shriveling. —Kait Hanson, Southern Living, 8 Mar. 2026

Southern Illinois summers can be brutal, bringing a double-punch of heat and high humidity that some visitors may wish to avoid. —Erika Ebsworth-Goold, Travel + Leisure, 7 Mar. 2026

For those exercising in heat and humidity, the goal should be to rehydrate without excessive fluid loss through sweat. —Khloe Quill, FOXNews.com, 7 Mar. 2026

The latest forecast from the National Weather Service says that low humidity levels and high winds in western Oklahoma will raise the danger of wildfire to a critical level on Friday afternoon. —Dale Denwalt, Oklahoman, 6 Mar. 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