As temperatures rise across the U.S., here’s what you need to know about high humidity and how it can affect you.

Sometimes the temperature outside feels warmer than it is, and there's a reason. Here's a breakdown of the heat index.

Maps show where extreme humidity and 90- or 100-degree temperatures will affect about 255 million people across the United States.

Relative humidity (RH) measures the amount of moisture in the air compared to the amount of total moisture the air can hold at a given temperature — for example, 55 F (13 C), as shown in the ...

A daily mismatch between temperature and humidity, observed in certain mountain and waterside regions, helps regulate atmospheric dryness. According to a new study published in Science Advances ...