Cooling Degree Day. An indicator of space cooling demand. The cooling degree days for a single day equal the average of the highest hourly temperature and the lowest hourly temperature for the day minus 65 degrees Fahrenheit, if greater than or equal to zero.
Cooling Degree Day. Cooling Degree Day (CDD) is a form of degree day used to estimate energy requirements for space cooling (e.g., air conditioning, refrigeration). One cooling degree day is obtained for each degree that the daily average temperature is above the base of 65 degrees F. For example, if the daily high temperature is 84 degrees and the daily low is 60 degrees, the average temperature for that day is 72 degrees F. The daily CDD is 7. If the average temperature is less than or equal to 65 degrees, the daily CDD is zero.
Cooling Degree Day. Difference between the actual temperature, as determined by the average of the high and low daily temperatures, and 65 degrees F. For example, if the daily high temperature is 77 degrees and the daily low is 65 degrees, the actual temperature for that day would be 71 degrees. The CDD's for that day would be 6 (71-65). If the average temperature is less than or equal to 65 degrees, the CDD's for the day would be zero