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

• 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

Some states could reach into the 100s with high humidity. —Eduardo Cuevas, USA Today, 21 June 2025

High humidity is also contributing to this weekend’s heat warning. —William Tong, Chicago Tribune, 21 June 2025

Elevated nighttime temperatures with high humidity can be even more dangerous, particularly for elderly populations or people with inadequate cooling options. —Marshall Shepherd, Forbes.com, 20 June 2025

Winds are forecasted to be northwest to north 25 to 40 mph with damaging gusts of 50 to 65 mph and relative humidity areas of humidity 10 to 25 percent, gradually rising late Saturday night. —Ca Weather Bot, Sacbee.com, 20 June 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