There are various ways to measure the amount of water vapor in the atmosphere. The amount of moisture a given parcel of air can hold is dependent on the ambient temperature. Higher temperatures mean ...

Dew point and relative humidity, two terms that have floated around many weather forecasts over the years. What exactly do they mean and when are they best used to describe the conditions outside? Let ...

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 ...

why do meteorologists use dew point rather than relative humidity to describe the uncomfortableness or oppressiveness of an air mass? Dew point is the temperature at which the air becomes “saturated” ...

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 ...