National Weather Service United States Department of Commerce

 

Temperature Conversion
Enter a number then click on the appropriate number to see the result.
Fahrenheit ( o F )
Celsius ( o C )

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Windchill Calculation
Enter in the air temperature ( Tair ) in degrees Fahrenheit and wind speed in mph, then click on the Calculate WC to compute the windchill ( WC ).
Tair mph

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Relative Humidity Calculation
Enter in the air temperature ( Tair ) and dew point temperature ( Tdp) in degrees Fahrenheit ( oF ) then click on the Calculate RH to compute the relative humidity ( RH )
Tair Tdp

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Heat Index Calculation
Enter in the air temperature ( Tair ) in degrees Fahrenheit and relative humidity ( RH ) in percent, then click on the Calculate HI to compute the heat index ( HI ).
Tair RH

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Wind Chill Table