CHAPEL HILL 2 W, NORTH CAROLINA

Period of Record General Climate Summary - Growing Degree Days

From Year=1891 To Year=2012
Station:(311677) CHAPEL HILL 2 W
Averages Daily Extremes
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 134 144 339 579 856 1057 1191 1160 944 629 332 153 7518
40 S 134 278 618 1196 2052 3109 4300 5460 6404 7033 7365 7518 7518
45 M 71 76 220 433 701 907 1036 1005 794 476 212 80 6011
45 S 71 147 367 800 1501 2408 3444 4449 5243 5719 5931 6011 6011
50 M 33 35 127 298 547 757 881 850 644 331 119 37 4658
50 S 33 68 195 494 1040 1797 2678 3528 4172 4503 4621 4658 4658
55 M 13 13 64 184 396 607 726 695 495 203 56 14 3464
55 S 13 26 90 273 669 1276 2002 2697 3192 3395 3450 3464 3464
60 M 4 3 27 97 256 458 571 540 350 104 20 4 2434
60 S 4 7 34 132 388 846 1416 1957 2306 2410 2430 2434 2434
Corn Growing Degree Days
50 M 87 98 218 365 553 712 811 790 627 396 213 98 4968
50 S 87 185 403 768 1321 2033 2843 3634 4261 4657 4870 4968 4968
Derived form the 1891-2012 Data
M = Monthly Data
S - Running sum of monthly data.
Growing 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.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
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