DURHAM, NORTH CAROLINA

Period of Record General Climate Summary - Growing Degree Days

From Year=1899 To Year=2012
Station:(312515) DURHAM
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 123 135 315 565 841 1043 1181 1143 929 614 306 140 7335
40 S 123 258 573 1138 1979 3023 4204 5347 6276 6890 7195 7335 7335
45 M 64 68 199 420 686 893 1026 988 779 461 189 71 5844
45 S 64 132 331 750 1436 2330 3356 4344 5123 5584 5772 5844 5844
50 M 29 29 110 284 531 743 871 833 629 316 102 32 4508
50 S 29 57 167 451 982 1725 2596 3430 4059 4375 4477 4508 4508
55 M 10 9 53 170 380 594 716 678 479 190 45 11 3336
55 S 10 19 72 242 622 1216 1932 2610 3090 3279 3325 3336 3336
60 M 2 2 20 86 241 444 561 524 334 94 15 3 2326
60 S 2 4 25 111 352 796 1357 1880 2215 2309 2324 2326 2326
Corn Growing Degree Days
50 M 82 95 210 360 541 702 806 782 614 389 202 94 4876
50 S 82 177 386 746 1287 1990 2796 3577 4191 4580 4782 4876 4876
Derived form the 1899-2012 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