MANY FARMS SCHOOL, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025204) MANY FARMS SCHOOL
From Year=1951 To Year=1975
Growing Degree Days for Selected Base Temperature (F)
Base Jan. Feb. Mar. Apr. May Jun. Jul. Aug. Sep. Oct. Nov. Dec. Annual
40 M 17 39 141 296 625 906 1114 1056 780 440 96 18 5527
40 S 17 56 197 493 1118 2023 3137 4193 4974 5414 5510 5527 5527
45 M 3 9 64 170 472 756 959 901 630 296 34 4 4298
45 S 3 12 76 246 717 1473 2432 3333 3963 4260 4294 4298 4298
50 M 0 1 22 75 325 606 804 746 481 173 7 0 3240
50 S 0 1 23 98 423 1029 1832 2579 3060 3233 3240 3240 3240
55 M 0 0 5 22 194 456 649 591 334 78 1 0 2329
55 S 0 0 6 28 222 677 1326 1917 2251 2328 2329 2329 2329
60 M 0 0 1 3 88 308 494 436 195 22 0 0 1548
60 S 0 0 1 4 92 400 894 1330 1525 1548 1548 1548 1548
Corn Growing Degree Days
50 M 30 66 159 267 445 564 701 676 518 340 115 24 3905
50 S 30 97 255 522 967 1531 2232 2908 3426 3766 3881 3905 3905
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