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What are "Heating Degree Days" and "Cooling Degree Days"?
If the mean temperature for the day is, say, 5 degrees higher than 65, then there have been 5 cooling degree days. On the other hand, if the weather has been cool, and the mean temperature is, say, 55 degrees, then there have 10 heating degree days (65 minus 55 equals 10).
Why do we want or need to know the number of "degree days?"
Where Can I Find the Actual Number of Degree Days Accumulated in Recent Months"?
Degree day calculations are made at the end of each day and sent out the following morning in a product called "Climate Report". Reports are made for Atlanta, Athens, Columbus and Macon and are available on the web. Select "Daily Climate Report (CLI)" under "Product", the location of interest, the time frame of interest, and then click on the yellow "GO" button". Degree day information is located about midway down the page that comes up. You can also get Degree Day totals on the "F6" (Preliminary Local Climate Data). Look under columns 6A and 6B. Again these are available for Atlanta, Athens, Columbus and Macon. ![]() |
National Weather Service Forecast Office 4 Falcon Drive Peachtree City, Georgia 30269 Phone: 770.486.1133 Page last modified: February 7, 2006 |
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