Humidity What is the dew point? How does dew form? Prentice Hall - Science Explorer. Asked by BookRagsHelper 12 years ago 12/31/2012 3:23 AM Last updated by anonymous 12 years ago 1/2/2013 8:00 PM
The dew point is the temperature at which the air fails to hold all of the moisture in it and dew forms. If the surface has been cooled to below freezing point, then the dew becomes frost.