COTTONWOOD, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(022193) COTTONWOOD
From Year=1949 To Year=1977
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 136 222 374 572 835 1088 1308 1229 1030 738 360 148 8040
40 S 136 358 731 1304 2139 3227 4535 5763 6794 7532 7893 8040 8040
45 M 49 113 236 425 680 938 1153 1074 880 585 223 54 6410
45 S 49 162 398 823 1503 2441 3594 4668 5548 6133 6356 6410 6410
50 M 10 43 123 285 525 788 998 919 730 434 109 11 4975
50 S 10 53 175 460 985 1774 2772 3690 4421 4854 4964 4975 4975
55 M 1 10 46 160 374 638 843 764 580 289 35 1 3741
55 S 1 11 57 217 591 1229 2072 2836 3416 3705 3740 3741 3741
60 M 0 1 10 65 233 488 688 609 431 161 5 0 2691
60 S 0 1 12 76 310 798 1486 2094 2525 2686 2691 2691 2691
Corn Growing Degree Days
50 M 137 191 286 393 527 653 803 769 643 479 274 147 5300
50 S 137 328 613 1006 1533 2186 2988 3757 4401 4879 5153 5300 5300
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 Jul 28, 2006
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