WATERLOO, ALABAMA

Period of Record General Climate Summary - Growing Degree Days

From Year=1922 To Year=1976
Station:(018686) WATERLOO
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 126 136 310 624 838 1031 1178 1143 951 638 319 160 7456
40 S 126 262 572 1196 2035 3066 4244 5387 6339 6977 7296 7456 7456
45 M 67 71 197 475 683 881 1023 988 801 485 201 85 5959
45 S 67 138 335 810 1494 2375 3398 4386 5187 5672 5874 5959 5959
50 M 31 29 110 336 529 731 868 833 651 339 110 39 4607
50 S 31 60 170 506 1035 1766 2634 3467 4119 4458 4568 4607 4607
55 M 12 9 54 213 377 581 713 678 503 212 52 13 3418
55 S 12 21 75 288 665 1247 1960 2638 3141 3352 3404 3418 3418
60 M 3 2 22 117 238 432 558 523 357 113 19 3 2387
60 S 3 5 27 144 382 814 1372 1895 2252 2365 2384 2387 2387
Corn Growing Degree Days
50 M 83 96 210 419 551 689 786 763 638 429 214 97 4977
50 S 83 180 389 808 1360 2048 2835 3598 4236 4666 4880 4977 4977
Derived form the 1922-1976 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