CHATOM, ALABAMA

Period of Record General Climate Summary - Growing Degree Days

From Year=1949 To Year=2012
Station:(011566) CHATOM
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 287 347 568 766 1012 1151 1256 1240 1071 803 488 332 9320
40 S 287 634 1202 1968 2980 4130 5387 6627 7698 8500 8988 9320 9320
45 M 181 232 420 616 857 1001 1101 1085 921 648 348 212 7622
45 S 181 413 833 1449 2306 3307 4409 5493 6414 7062 7410 7622 7622
50 M 103 140 285 468 702 851 946 930 771 494 226 124 6041
50 S 103 243 529 996 1698 2549 3496 4425 5197 5691 5916 6041 6041
55 M 54 74 172 324 547 701 791 775 621 345 130 64 4599
55 S 54 128 300 624 1171 1872 2663 3438 4059 4405 4534 4599 4599
60 M 23 32 88 196 394 551 636 620 472 212 62 27 3314
60 S 23 55 143 340 733 1284 1920 2540 3012 3225 3286 3314 3314
Corn Growing Degree Days
50 M 193 233 379 512 676 768 842 831 719 532 330 220 6234
50 S 193 426 805 1317 1993 2761 3603 4434 5152 5685 6014 6234 6234
Derived form the 1949-2012 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