Degree Days Calculator

This online calculator pulls weather station data--including heating and cooling degree days (HDD and CDD)--from more than 900 weather stations around the United States and Canada. Use the weather normalization data here to adjust your building's or industrial plant's energy usage data for changes in weather.

Enter in your information below to get started.


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About HDD and CDD

Heating Degree Days (HDD) and Cooling Degree Days (CDD) are a measure of how much heating or cooling is necessary given the recorded temperatures for a particular weather station for a given time period. They are computed relative to a base of 65°F. Learn More