Dew point

Dew point is the temperature at which condensation begins. The temperature to which air must be cooled for saturation to occur, exclusive of air pressure or moisture content change. At that temperature dew begins to form, and water vapor condenses into liquid. When the dew point falls below freezing it is called the frost point.

External Links

• National Science Digital Library - Dew Point Temperature (http://www.nsdl.arm.gov/Library/glossary.shtml#Dew_point_temperature)