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

Construction in the remote canyon presented difficulties, including limited working space, persistent humidity and fog, and the need for regular checks of the steel structure. — Sujita Sinha, Interesting Engineering, 17 Aug. 2026

Tuesday and most of Wednesday look dry and warm, with highs in the upper 80s to around 90 and humidity gradually increasing. — Andrew Kozak, CBS News, 17 Aug. 2026

Typically prone to frizziness and puffiness the moment there’s a whiff of humidity in the air, Color Wow’s Extra Strength Dream Coat spray maintains sleekness like no other—a necessity to keep my hair shiny and smooth until my next wash day. — Kiana Murden, Vogue, 17 Aug. 2026

Hot and humid air lingers in Kansas City Saturday before cooler air shifts into the metro, brining with it chances of rain and storms, and a short break from the humidity. — Kendrick Calfee, Kansas City Star, 15 Aug. 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