cooling degree day: a measurement used to determine how much fuel will be needed to cool indoor environments. There is one cooling degree-day unit for each degree that the mean daily temperature departs from 65 °F or 18 °C.
Cooling Degree Days - A form of degree-day used to estimate energy requirements for air conditioning or refrigeration.
COOLING DEGREE DAY A cooling degree day is given for each degree that the daily mean temperature departs above the baseline of 75 degrees Fahrenheit.
Cooling Degree Day (CDD)- useful in determining cooling energy requirements. Defined as (MT - 65)= CDD,where MT is Mean Temperature (F). If MT is less than 65 degrees F, CDD=0. MT= Mean (average)Temperature of the day.
Cooling Degree Day- A form of degree day used to estimate the required energy for cooling. one cooling degree day occurs for each degree the daily mean temperature is above 65 degrees Fahrenheit.
Cooling Degree Day see Degree Day.
Cooperative Observer An individual (or institution) who takes precipitation and temperature observations-and in some cases other observations such as river stage, soil temperature, ...
Total cooling degree days. 106
Total heating degree days. 54
Thunderstorms occurred 5 days. On the 2nd., 7th., 25th., 27th., & 30th.
A trace of snow occurred on the 2nd. as 1/4" hail. "Melted as it fell".
For more specific definitions and how to calculate degree days, see the definitions for Heating Degree Days and Cooling Degree Days.
If the difference is positive, it is called a "Cooling Degree Days". If the difference is negative, it is called a "Heating Degree Days". The magnitude of the difference is the number of days.
Heating degree days are summations of negative differences between the mean daily temperature and the 18 °C base; cooling degree days are summations of positive differences from the same base.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: CDD, Composite, Cooling Degree Days, Degree Day, Growing Degree Day, HDD, Heating Degree Days
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Degree Day- a measure of the departure of the daily mean temperature from the normal daily temperature; heating and cooling Degree Days are the departure of the daily mean temperature from sixty-five degrees Fahrenheit.
and heating, and air conditioning industries utilize heating and cooling degree information to calculate their needs. For more specific definitions and how to calculate degree days, see the definitions for Heating Degree Days and Cooling Degree Days.
 See also: Weather, Degree, Temperature, Thunderstorm, Thunder
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