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

Their bloom cycle is affected by day length, temperature, humidity, water and feeding. — Clarence Schmidt, San Diego Union-Tribune, 10 Aug. 2026

Changes to temperature, wind speed and humidity occur as the moon crosses in front of the sun during a solar eclipse and casts a shadow on Earth’s surface. — Mary Gilbert, CNN Money, 10 Aug. 2026

Even without El Niño, ocean temperatures have soared off parts of the coastline — a factor in the recent rounds of uncharacteristic muggy humidity. — Los Angeles Times, 10 Aug. 2026

Some have water-resistant materials that protect devices from exposure to humidity, rain or moisture. — Bestreviews, Mercury News, 10 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