TUCSON U OF A #1, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(028817) TUCSON U OF ARIZ # 1
From Year=1982 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 398 437 647 820 1116 1334 1477 1438 1267 975 584 371 10865
40 S 398 835 1483 2303 3419 4753 6229 7668 8935 9910 10494 10865 10865
45 M 251 299 493 670 961 1184 1322 1283 1117 820 436 228 9064
45 S 251 550 1042 1713 2673 3858 5179 6463 7580 8400 8836 9064 9064
50 M 126 173 342 521 806 1034 1167 1128 967 665 295 110 7333
50 S 126 299 641 1162 1968 3002 4168 5297 6264 6929 7223 7333 7333
55 M 45 76 205 375 651 884 1012 973 817 511 171 34 5755
55 S 45 122 327 702 1352 2236 3248 4221 5038 5550 5721 5755 5755
60 M 9 21 98 239 496 734 857 818 667 361 76 4 4380
60 S 9 30 128 367 863 1597 2454 3272 3939 4300 4376 4380 4380
Corn Growing Degree Days
50 M 281 298 422 523 688 797 928 917 804 622 386 265 6930
50 S 281 579 1001 1523 2211 3008 3936 4853 5657 6279 6664 6930 6930
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