MARICOPA 4 N, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025270) MARICOPA 4 N
From Year=1960 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 336 416 625 826 1136 1383 1611 1554 1307 962 548 316 11020
40 S 336 751 1376 2202 3339 4722 6333 7887 9194 10156 10704 11020 11020
45 M 193 277 471 676 981 1233 1456 1399 1157 807 399 174 9225
45 S 193 471 941 1617 2599 3832 5288 6687 7844 8652 9051 9225 9225
50 M 81 152 319 526 826 1083 1301 1244 1007 652 258 67 7518
50 S 81 233 553 1079 1905 2989 4290 5534 6541 7193 7451 7518 7518
55 M 21 60 184 379 671 933 1146 1089 857 499 137 14 5990
55 S 21 81 265 644 1315 2248 3395 4484 5341 5840 5977 5990 5990
60 M 3 14 83 241 517 783 991 934 707 350 53 1 4677
60 S 3 17 100 340 857 1641 2632 3566 4273 4623 4676 4677 4677
Corn Growing Degree Days
50 M 261 303 423 525 677 795 970 946 793 601 388 251 6933
50 S 261 564 987 1512 2190 2984 3954 4900 5693 6294 6682 6933 6933
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