CHAPEL HILL 2 W, NORTH CAROLINA

Period of Record General Climate Summary - Heating Degree Days

From Year=1891 To Year=2012
Station:(311677) CHAPEL HILL 2 W
Averages Daily Extremes
Heating Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
65 763 644 465 212 58 5 0 1 22 187 436 708 3503
60 611 506 328 119 20 1 0 0 6 95 301 557 2545
57 522 426 254 78 9 0 0 0 2 58 230 469 2048
55 465 374 210 56 5 0 0 0 1 39 187 412 1749
50 331 255 118 20 1 0 0 0 0 12 100 280 1117
Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. 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