Dew Point

Dew point, abbreviated as \(T_d\) is the temperature at which air must be cooled to become saturated with water vapor.  It is porportional to the amount of water vapor in a given amount of air and when the dew point is raised the more water vapor present, also the opposite.

 

Dew Point formula
\(\large{ T_d =  T -  \frac{ 100 \;-\; RH  }{ 5 }  }\)
Symbol	English	Metric
\(\large{ T_d }\) = dew point	\(\large{F}\)	\(\large{C}\)
\(\large{ RH }\) = relative humidity	\(\large{dimensionless}\)
\(\large{ T }\) = temperature	\(\large{F}\)	\(\large{C}\)