DURHAM, NORTH CAROLINA

Period of Record General Climate Summary - Cooling Degree Days

From Year=1899 To Year=2012
Station:(312515) DURHAM
Averages Daily Extremes
Cooling Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
55 10 9 53 170 380 594 716 678 479 190 45 11 3336
57 6 5 37 133 323 534 654 616 420 147 30 7 2913
60 2 2 20 86 241 444 561 524 334 94 15 3 2326
65 0 0 6 33 126 298 406 369 202 34 3 0 1479
70 0 0 1 7 46 165 254 220 96 9 0 0 799
Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Table updated on May 22,
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Southeast Regional Climate Center, SERCC Webmaster