Relative humidity has been used to describe moisture levels in the atmosphere for so long that it has become the most common (though often misunderstood) moisture measurement. And there is truth to ...

Dew point/relative humidity questions come up fairly often and this is a good one. Water vapor in the atmosphere is pretty important for deep-sky observing and photography. The atmosphere can only ...

Humidity - arguably the most important factor in deciphering how pleasant a day will be. We all know 90 degrees with high humidity and 90 degrees with no humidity is a different ball game. The ...

In a large part of the United States, winter months bring about bitterly cold temperatures. That cold air carries less moisture than warm air, and when that cold air is heated by your furnace (which ...

Fog can form when the humidity is less than 100 percent, but it generally is in the range of 95 to 100 percent when fog is present. Occasionally, though rarely, the relative humidity will be 100 ...

The first major heat wave of summer has enveloped much of the midwestern and eastern U.S. in a brutal “dome” of record temperatures and high humidity. The dome phenomenon happens when weather ...