DOUGLAS SMELTER, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(022669) DOUGLAS SMELTER
From Year=1903 To Year=1973
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 195 266 447 634 881 1129 1252 1191 1035 759 391 209 8389
40 S 195 461 908 1542 2423 3551 4803 5994 7029 7789 8180 8389 8389
45 M 87 146 298 484 726 979 1097 1036 885 605 250 94 6687
45 S 87 234 532 1016 1742 2720 3818 4853 5739 6343 6594 6687 6687
50 M 26 59 166 337 571 829 942 881 735 451 129 26 5154
50 S 26 86 252 589 1160 1988 2930 3811 4547 4998 5127 5154 5154
55 M 4 15 68 199 417 679 787 726 585 302 45 4 3830
55 S 4 19 87 286 703 1382 2169 2894 3480 3782 3826 3830 3830
60 M 0 2 16 87 268 529 632 571 436 165 8 0 2714
60 S 0 2 18 105 373 902 1534 2105 2540 2706 2713 2714 2714
Corn Growing Degree Days
50 M 188 227 337 440 564 686 810 785 670 506 306 194 5713
50 S 188 414 751 1191 1756 2441 3251 4036 4707 5213 5519 5713 5713
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