Calculate Dewpoint, Wet-bulb Temperature from Relative Humidity
Simple online weather calculator to find the dewpoint and the wet-bulb temperature by knowing the values of relative humidity, temperature and actual station pressure.
Dewpoint from Wet-bulb
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Temperature:
Fahrenheit Celsius Kelvin -
Relative Humidity (%):
-
Actual station pressure:
in of Hg mm of Hg millibars (hPA) -
Wet-bulb (Unit)
Dewpoint
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(Fahrenheit)
-
(Celsius)
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(Kelvin)
Formula
Where,
T = Air temperature,
Tw = Wet-bulb temperature,
psta = Station pressure,
ew = Vapor pressure related to wet-bulb temperature,
es = Saturated Vapor pressure,
e = actual vapor pressure,
rh = Relative humidity,
Td = Dewpoint temperature.
Calculation of relative humidity and dewpoint is made easier by knowing the wet-bulb temperature.It is used in weather forecasting.