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

In San Francisco, the humidity is expected to hover between 80% and 90% as the temperatures creep into the low 70s. — Rick Hurd, Mercury News, 13 July 2026

Storm chances increase across Central Florida in the afternoon, but coupled with humidity that could bring the heat index, or feels-like temperatures, to as much as 107 degrees, the National Weather Service in Melbourne stated. — Richard Tribou, The Orlando Sentinel, 13 July 2026

Even when summer humidity tops 98 percent, your skin still needs hydration. — Irene Richardson, InStyle, 13 July 2026

In response to high heat and humidity that is in the forecast for Tuesday, some of Metro Detroit's communities announced that cooling center services will be available to local residents. — Paula Wethington, CBS News, 13 July 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