MUSCLE SHOALS FAA ARPT, ALABAMA

Period of Record General Climate Summary - Growing Degree Days

From Year=1940 To Year=2012
Station:(015749) MUSCLE SHOALS FAA ARPT
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 141 187 392 646 906 1113 1243 1212 985 671 349 177 8022
40 S 141 328 720 1366 2272 3385 4628 5840 6825 7497 7845 8022 8022
45 M 76 107 264 498 751 963 1088 1057 835 518 228 97 6481
45 S 76 183 446 944 1695 2658 3747 4804 5638 6156 6384 6481 6481
50 M 37 54 160 357 596 813 933 902 685 368 131 47 5084
50 S 37 91 251 608 1204 2017 2950 3852 4537 4905 5036 5084 5084
55 M 15 22 86 230 442 663 778 747 535 234 63 19 3835
55 S 15 37 123 353 795 1458 2237 2984 3518 3752 3816 3835 3835
60 M 4 6 37 127 296 513 623 592 388 126 24 5 2741
60 S 4 11 48 174 470 983 1606 2198 2586 2712 2736 2741 2741
Corn Growing Degree Days
50 M 80 109 231 401 593 759 853 829 660 422 207 98 5243
50 S 80 190 421 822 1415 2174 3027 3855 4515 4937 5144 5243 5243
Derived form the 1940-2012 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