DOUGLAS FAA AP, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(022664) DOUGLAS FAA AP
From Year=1948 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 191 250 421 618 886 1125 1223 1165 1011 740 378 192 8199
40 S 191 441 862 1480 2365 3491 4713 5878 6889 7628 8007 8199 8199
45 M 81 134 275 468 731 975 1068 1010 861 585 241 82 6510
45 S 81 214 489 958 1688 2664 3732 4741 5602 6187 6427 6510 6510
50 M 20 50 149 323 576 825 913 855 711 432 122 21 4998
50 S 20 70 220 543 1119 1944 2857 3712 4422 4854 4977 4998 4998
55 M 2 11 58 190 422 675 758 700 561 284 41 3 3704
55 S 2 13 71 262 684 1359 2117 2816 3377 3661 3702 3704 3704
60 M 0 1 12 83 273 525 603 545 411 152 6 0 2612
60 S 0 1 13 97 370 895 1498 2043 2453 2605 2612 2612 2612
Corn Growing Degree Days
50 M 186 218 322 429 566 690 794 770 658 488 296 189 5604
50 S 186 404 725 1154 1720 2410 3205 3975 4632 5120 5416 5604 5604
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 Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu