NC State Extension

Degree Day – Defined

The difference between the daily median temperature and 65 F. Degree days are used as a measure of the temperature variance. Days where the daily median temperature is below 65 F are Heating Degree Days and days where the daily median temperature is above 65 F are Cooling Degree Days.

Written By

Photo of Laura LanghamLaura LanghamEnergy Conservation Program Manager (919) 515-8474 laura_langham@ncsu.eduAgricultural and Human Sciences - NC State University
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