Dew Point
What is dew point?
The dew point is the temperature to which air must be cooled (at constant pressure) to become saturated with moisture. When the air temperature drops to the dew point, condensation occurs—forming dew, fog, clouds, or precipitation. On the test: a small spread between temperature and dew point means the air is near saturation, so expect visible moisture like fog or low clouds.
Also known as: dewpoint, dew point temperature
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