# Relative Humidity from Wet-Bulb

Equations

In the above equation, T is the temperature in °C, Wb is the wet-bulb temperature in °C, P_{sta} is the station pressure in millibars, e_{s} is the saturation vapor pressure in millibars, e_{w} is vapor pressure related to the wet-bulb temperature in millibars, e is the actual vapor pressure in millibars, and rh is the relative humidity in percent.