CHAPEL HILL 2 W, NORTH CAROLINA

Period of Record General Climate Summary - Cooling Degree Days

From Year=1891 To Year=2012
Station:(311677) CHAPEL HILL 2 W
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 13 13 64 184 396 607 726 695 495 203 56 14 3464
57 8 8 46 146 338 547 664 633 436 160 38 9 3033
60 4 3 27 97 256 458 571 540 350 104 20 4 2434
65 0 0 9 40 139 312 416 386 216 41 5 1 1566
70 0 0 2 10 54 178 264 236 108 11 1 0 863
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