PRATTVILLE, ALABAMA

Period of Record General Climate Summary - Growing Degree Days

From Year=1899 To Year=1977
Station:(016640) PRATTVILLE
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 280 308 527 722 975 1151 1253 1239 1074 788 437 281 9036
40 S 280 587 1115 1836 2812 3963 5216 6455 7530 8317 8755 9036 9036
45 M 171 195 381 572 820 1001 1098 1084 924 633 300 168 7348
45 S 171 366 747 1319 2139 3141 4239 5323 6247 6880 7181 7348 7348
50 M 94 110 252 424 665 851 943 929 774 481 185 89 5798
50 S 94 204 456 880 1545 2396 3340 4269 5043 5524 5709 5798 5798
55 M 46 55 147 284 511 701 788 774 624 335 98 41 4406
55 S 46 101 248 532 1043 1744 2532 3306 3931 4266 4365 4406 4406
60 M 17 23 72 162 358 551 633 619 475 206 42 15 3173
60 S 17 39 111 273 631 1182 1816 2435 2910 3116 3159 3173 3173
Corn Growing Degree Days
50 M 168 192 335 464 650 784 864 857 732 518 277 169 6011
50 S 168 360 695 1160 1810 2594 3458 4315 5047 5565 5842 6011 6011
Derived form the 1899-1977 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