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?

In the fields of HVAC performance verification and measurement engineering, an accurate understanding of humidity is a ...

A bottle just taken out of the refrigerator. On some days, the outside gets covered in moisture immediately, while on other ...

NORFOLK, Va. — Most summer days, you hear us talk about “humidity” when describing how the air feels. While many people are familiar with the term relative humidity — the percentage of water vapor in ...

Anyone who has spent a summer afternoon in Houston versus Phoenix knows the numbers on a thermometer only tell part of the ...

Imagine you’re sitting among friends on the porch with a big pitcher of ice cold lemonade. The heat is searing and the air is still and stifling. It’s almost hard to breathe. You look to your friends ...

Inside a Chinese solar greenhouse, the air is not one climate but many. On a sunny winter afternoon, the temperature near the ...

Trey Fulbright is the newest meteorologist on the KDKA First Alert Weather Team. In addition to seeing his forecasts on air, he also does weather and climate reporting. Trey comes to KDKA from Des ...