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 corn stalks across the state emit more moisture into the atmosphere, causing the humidity to rise. — Christopher Kamrani, New York Times, 7 Sep. 2026

Indoor air quality tends to decline as pollen, dust and humidity accumulate over the summer months, and most people spend the vast majority of their time indoors, according to the Environmental Protection Agency. — Olivia Laborde, AJC.com, 7 Sep. 2026

Residents can expect winds to be southwest 15 to 25 mph with gusts up to 40 mph and humidity as low as 8%. — Ca Weather Bot, Sacbee.com, 6 Sep. 2026

Redwood said the temperature was close to 100 degrees Fahrenheit with 80% humidity. — Marnie Hunter, CNN Money, 5 Sep. 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