Degree Days from Mean Temperature

Mean Temperature:

°F °C K

Heating Degree Days:

Cooling Degree Days:

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If the mean temperature is below 65°F, heating degree days occurred:

If the mean temperature is above 65°F, cooling degree days occurred:

In the above equations, HDD are the heating degree days in °F, CDD are the cooling degree days in °F, and T is the mean temperature in °F.