National Weather Service United States Department of Commerce

Relative Humidity

by Tim Brice and Todd Hall
Enter a temperature, relative humidity and actual station pressure
Temperature:  wet-bulb  unit


Fahrenheit Celsius Kelvin Fahrenheit
RH: Celsius
% Kelvin
Enter your actual station pressure (not the altimeter setting):  
in of mercury mm of mercury millibars (hPA)  


What is the formula for the relative humidity script?