I comment from time to time on how the dew point temperature can be a good guide as to what the coming overnight low temperature might be. A reader wonders if there is such a relationship for relative ...

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 ...

Air pollution is not taken into consideration. Actually, relative humidity is not directly measured. The air temperature and dew point temperature are measured, and the relative humidity is then ...

This article from Omega Engineering discusses the challenges involved with relative humidity in the lab. This article from Omega Engineering discusses the challenges involved with relative humidity in ...

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 ...

On a calm, clear night, the ground cools very efficiently by radiating heat back into the atmosphere. This lowers the temperature of the air near the ground. By morning, temperatures will most often ...

If you get your current weather information in the morning, you should know that the morning relative humidity is not a useful indicator of how humid the weather will be today. In fact, the relative ...

Dew point can be calculated using the air temperature and a relative humidity value, which is measured using something called a sling psychrometer. A psychrometer is a metal rod, around 6 inches long, ...

MOLINE, Ill. — Many of us have switched on the furnace for the first time this fall season and that's a trend that will likely continue heading into the remaining weeks of October. With each passing ...