BIRMINGHAM FAA ARPT, ALABAMA

Period of Record General Climate Summary - Growing Degree Days

From Year=1930 To Year=2012
Station:(010831) BIRMINGHAM 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 204 247 456 681 942 1127 1250 1232 1031 732 401 233 8536
40 S 204 451 907 1588 2530 3657 4907 6139 7170 7902 8303 8536 8536
45 M 119 152 319 532 787 977 1095 1077 881 578 272 137 6925
45 S 119 270 590 1122 1909 2886 3981 5058 5938 6517 6789 6925 6925
50 M 62 82 204 388 632 827 940 922 731 427 166 72 5452
50 S 62 144 348 736 1368 2195 3135 4057 4787 5214 5380 5452 5452
55 M 27 38 114 256 478 677 785 767 581 286 87 33 4130
55 S 27 66 180 436 913 1591 2376 3142 3723 4009 4096 4130 4130
60 M 9 14 53 145 328 527 630 612 433 167 37 11 2966
60 S 9 23 76 221 550 1077 1707 2319 2751 2918 2955 2966 2966
Corn Growing Degree Days
50 M 113 147 278 434 628 773 862 851 700 469 242 132 5629
50 S 113 260 538 972 1600 2372 3235 4085 4785 5254 5497 5629 5629
Derived form the 1930-2012 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