Frequently Asked Weather Questions - WCAX.COM Local Vermont
News, Weather and Sports-  Frequently Asked Weather Questions
Q: What is dew point? --Gary's Answer:  A: The technical
definition of the dew point (or dew point temperature) - is that
it is temperature at which water vapor in the air will condense
into liquid form if the air temperature lowers to match that dew
point temperature. The dew point can tell us many useful things
about the weather.  Water vapor is a gas, and is one of several
gases that make up the atmosphere, with nitrogen and oxygen
making up the bulk of it. The water vapor content in the air can
vary, depending on the weather conditions. The dew point is an
indication of just how much moisture is in the air. If the dew
point is high (like in the 60s or 70s), then that indicates a
lot of water vapor in the air. If the dew point is low (like in
the 40s or lower), then that indicates less water vapor, hence
the air is drier.  The dew point is either lower or the same as
the air temperatur