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

As temperatures drop and humidity plummets, the skin’s natural moisture levels decline faster, fine lines look more pronounced, and that tight, uncomfortable feeling can become a near-daily occurrence. —Colleen Sullivan, InStyle, 10 Jan. 2026

Shut off the humidifier if your room starts to feel damp or use a hygrometer to keep an eye on humidity levels. —Brandee Gruener, Southern Living, 10 Jan. 2026

Arena workers spent more than an hour attempting to mop condensation off the court, an ultimately fruitless endeavor due to the unassailable humidity inside the stadium. —Julia Poe, Chicago Tribune, 9 Jan. 2026

Its core instrument, the Infrared Sounder, collects temperature profiles and humidity profiles. —Richard Tribou, The Orlando Sentinel, 9 Jan. 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