WILLCOX, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(029334) WILLCOX
From Year=1898 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 119 180 340 524 776 1020 1202 1135 948 642 293 118 7294
40 S 119 299 639 1162 1938 2957 4159 5294 6242 6884 7176 7294 7294
45 M 38 80 201 376 621 870 1047 980 798 488 162 39 5700
45 S 38 119 320 696 1317 2186 3233 4213 5011 5498 5661 5700 5700
50 M 7 23 92 236 467 720 892 825 648 337 66 7 4319
50 S 7 30 122 358 825 1544 2436 3261 3909 4246 4312 4319 4319
55 M 0 3 28 118 317 570 737 670 498 198 17 1 3155
55 S 0 4 31 150 466 1036 1772 2443 2940 3138 3155 3155 3155
60 M 0 0 4 41 179 420 582 515 349 88 2 0 2181
60 S 0 0 5 46 224 645 1226 1742 2090 2178 2181 2181 2181
Corn Growing Degree Days
50 M 147 191 300 406 526 615 755 731 605 459 271 151 5157
50 S 147 338 638 1044 1570 2185 2940 3671 4276 4735 5006 5157 5157
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