It's a T-shirt kind of day in Washington, DC: 85 degrees with 63 percent humidity. We all know those numbers mean hot, but what exactly does that humidity percentage tell us? And why should we care?

What happens to smoke particles after sunset can depend strongly on something as familiar as the amount of water in the air.

High humidity forces your body's cooling systems to work harder than usual, leading to fatigue. Studies show that when ...

Dry air and poor humidity control in classrooms are drawing scrutiny as districts weigh health, budget, and building-maintenance tradeoffs.

New research finds indoor relative humidity between 40 and 60 percent is associated with relatively lower rates of COVID-19 infections and deaths, while indoor conditions outside this range are ...

Are you wondering what the target indoor humidity should be in winter?By comparing figures from official sources, a range of ...

YOUNGSTOWN, Ohio (WKBN) – There might not be a more misunderstood phrase in meteorology than “relative humidity.” Every summer when humidity returns, this phrase echoes across the United States: “It ...

PITTSBURGH (KDKA) -- Many people around Pittsburgh are used to using "relative humidity" to determine how muggy it may, or may not, feel. Using relative humidity is not the best way to do it. While ...

Maintaining relative humidity in the 40%-60% range in indoor spaces could help slow the spread of the coronavirus this winter, according to a November 18, 2020 Washington Post opinion piece ...

Deep inside the caves of the Pyrenees, some of Earth's most specialized animals are living on a physiological knife edge, and ...