What does Dewpoint mean?

Question

What does Dewpoint mean?

Answer 1

Dew point is the temperature at which the air becomes saturated.  If the dew point and the temperature are the same, then you have 100% humidity and air is very moist.

Answer 2

The dewpoint temperature is the temperature you would have to drop to so that the air is saturated with moisture (i.e., at 100% Relative Humidty), keeping pressure and water vapor content constant. The dewpoint temperature is always less than air temperature, except at 100% RH at which they become the same. Like RH, dewpoint temperature is a measure of the amount of moisture in the air, but unlike RH, it is an absolute measure of moisture as opposed to relative. A higher dewpoint temperature means more moisture, or more "sticky" humid conditions. In general, dewpoint temperatures over 60 F start to get uncomfortable.

On a psychrometric chart, if you find your conditions on the chart and then draw a horizontal line left to the saturation line, the point on the temperature axis where it intersects the saturation line is the dewpoint temperature.

Answer 3

the temperature at which the liquid water, or dew, evaporates at the same rate at which it condenses

Answer 4

The dewpoint is the temperature at which dew forms. A dewpoint, especially in warm and hot weather, is a good indicator of the comfort level outdoors. For example, a dewpoint below 60 is normally very comfortable and dry. 60-65 means that there is some humidity in the air, but the air is still relatively comfortable. Above 65, is starts to feel a bit sticky, but still not horrible. Above 70 begins to feel very uncomforable. And above 75 is disgusting.

Answer 5

The temperature to which a given parcel of air must be cooled, at constant barometric pressure, for water vapor to condense into water. The condensed water is called dew. The dew point is a saturation point.

:P to all except the questioner