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

The difference appeared to be high heat and humidity, Farrell said. — Jen Christensen, CNN Money, 4 Nov. 2026

El Niño conditions have fueled unprecedented humidity in Southern California this year, boosting mosquito activity. — Deborah Vankin, Los Angeles Times, 4 Nov. 2026

That uneasy feeling settles over the rest of Infinite Now like suffocating humidity. — Andrew Ryce, Pitchfork, 3 Nov. 2026

Oregon State University Extension says the bulbs are usually held at roughly 140 to 194 degrees Fahrenheit and 70% to 90% humidity for a long stretch of time. — Ryan Brennan, Kansas City Star, 3 Nov. 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