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

Boulder Fire Rescue Friday is a First Alert Weather Day with dangerous winds, low humidity levels and record heat expected. —Jennifer McRae, CBS News, 19 Dec. 2025

Unlike other yews, plants tolerate summer heat and humidity, exhibiting drought tolerance once established. —Kim Toscano, Southern Living, 19 Dec. 2025

The Florida Department of Health advises keeping indoor humidity below 60% to prevent mold growth, with below 50% even better for controlling both mold and dust mites. —Allison Palmer, Miami Herald, 18 Dec. 2025

Expect winds to be wind gusts of 45 to potentially 55 mph are expected this afternoon and humidity values will drop as low as 20-25% this afternoon. —Kansas City Star Weather Bot, Kansas City Star, 18 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