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

• damp
• dampness
• moistness
• 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

Even a small amount, such as high humidity outdoors or condensation constantly dripping off the inside of a window or steam inside of a bathroom, can cause mold in a home. —Bestreviews, Mercury News, 1 Apr. 2025

High temperatures will hover around the mid-80s each day this week, with the heat index in the mid-90s due to the humidity. —Abigail Hasebroock, Sun Sentinel, 31 Mar. 2025

West winds around 20 mph, with gusts up to 40 mph are expected, combined with dangerously low humidity of 7-13 percent. —Ron Estes, MSNBC Newsweek, 30 Mar. 2025

Plant tropical vegetables that won’t mind the summer heat and humidity. —Tom MacCubbin, The Orlando Sentinel, 29 Mar. 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