With summer here, one component of our daily weather can make or break our enjoyment of the season, and that's the humidity. So, exactly what is humidity, what do the different values of it really ...

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 ...

Dew point is the temperature at which the air becomes “saturated” – in other words, it is holding all the water vapor it possibly can. If the temperature and the dew point equal each other, the water ...

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 ...

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 ...

Whether a summer day is great or awful often comes down to the humidity. With summer here, one component of our daily weather can make or break our enjoyment of the season, and that's the humidity. So ...

The heat index shows how humidity makes hot days feel hotter, and why direct sun can push dangerous conditions even higher.