WITTMANN 4SW, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029464) WITTMANN
From Year=1923 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 322 376 572 789 1091 1319 1583 1526 1297 977 577 360 10791
40 S 322 698 1270 2059 3150 4469 6052 7578 8876 9853 10430 10791 10791
45 M 186 242 418 639 936 1169 1428 1371 1147 822 429 217 9004
45 S 186 427 845 1484 2420 3589 5017 6389 7536 8358 8787 9004 9004
50 M 80 127 271 490 781 1019 1273 1216 997 667 288 101 7312
50 S 80 207 479 969 1750 2769 4042 5258 6255 6922 7210 7312 7312
55 M 22 49 147 346 626 869 1118 1061 847 513 165 31 5795
55 S 22 71 218 564 1191 2060 3178 4239 5086 5599 5764 5795 5795
60 M 3 11 62 215 474 719 963 906 697 362 73 5 4491
60 S 3 14 77 291 765 1484 2447 3354 4051 4413 4487 4491 4491
Corn Growing Degree Days
50 M 216 241 370 497 674 797 974 957 820 626 370 232 6774
50 S 216 457 827 1324 1998 2795 3770 4727 5546 6172 6542 6774 6774
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