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

• 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

When August rolls around, there’s finally an end in sight to the relentless summer heat and humidity. —Karen Brewer Grossman, Southern Living, 7 Aug. 2025

Christophe Magny, head of the Aude region fire brigade, told BFMTV that extreme weather conditions combining low humidity (25%), wind at more than 30km/h and temperatures around 35 degree celsius, created ideal conditions for the fire to spread. —Pierre Barin, CNN Money, 6 Aug. 2025

Red flag warnings remain in place for parts of Nevada, Utah, Colorado and Wyoming due to very dry conditions, low humidity and gusty winds that could rapidly spread new fires. —Kenton Gewecke, ABC News, 5 Aug. 2025

Then the sweltering heat and high humidity will ramp up for the second half of the week, as temperatures climb in the low to mid-90s, the weather service said. —Kansas City Star, 5 Aug. 2025

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