What does the dew point measure? Mike Moss: The number of a dew point, for example 62, represents the temperature at which a given air mass would be saturated with water vapor, so that any additional ...

Relative humidity: The percentage of saturation of air; the ratio, expressed as a percentage, of the actual amount of water vapor in a given volume of air to the amount that would be present were the ...

We’ve recently received several reader requests asking us how to calculate relative humidity if the temperature and dew point are known. Relative humidity is the ratio (expressed as a percentage) of ...