BLACKBEARD ISLAND, GEORGIA

Period of Record General Climate Summary - Growing Degree Days

From Year=1940 To Year=1974
Station:(090946) BLACKBEARD ISLAND
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 348 359 573 787 1035 1178 1289 1282 1137 908 590 381 9869
40 S 348 707 1281 2068 3103 4281 5570 6853 7990 8898 9488 9869 9869
45 M 222 237 421 637 880 1028 1134 1127 987 753 442 248 8117
45 S 222 458 879 1517 2397 3425 4559 5686 6674 7427 7869 8117 8117
50 M 124 137 279 487 725 878 979 972 837 599 301 144 6463
50 S 124 261 540 1027 1752 2631 3610 4582 5419 6018 6319 6463 6463
55 M 57 66 160 340 570 728 824 817 687 445 179 70 4945
55 S 57 123 283 623 1193 1922 2746 3563 4250 4696 4875 4945 4945
60 M 18 24 75 205 416 578 669 662 537 300 85 27 3598
60 S 18 42 117 323 739 1317 1986 2648 3186 3486 3571 3598 3598
Corn Growing Degree Days
50 M 193 203 341 503 707 823 897 896 806 605 351 220 6545
50 S 193 396 737 1240 1947 2771 3667 4563 5369 5974 6325 6545 6545
Derived form the 1940-1974 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