TOMBSTONE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(028619) TOMBSTONE
From Year=1893 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 250 297 460 655 919 1152 1221 1156 1028 791 452 258 8639
40 S 250 547 1006 1661 2580 3732 4953 6109 7137 7928 8381 8639 8639
45 M 129 175 313 506 764 1002 1066 1001 878 636 310 137 6918
45 S 129 305 618 1124 1887 2889 3955 4956 5835 6471 6781 6918 6918
50 M 48 82 184 361 609 852 911 846 728 483 183 55 5342
50 S 48 130 315 675 1284 2137 3047 3893 4622 5105 5288 5342 5342
55 M 11 25 86 227 455 702 756 691 578 334 84 13 3963
55 S 11 36 123 349 805 1507 2263 2954 3532 3866 3950 3963 3963
60 M 1 4 28 114 307 552 601 536 428 196 24 1 2793
60 S 1 5 33 147 453 1006 1606 2143 2571 2767 2792 2793 2793
Corn Growing Degree Days
50 M 166 196 300 421 589 723 796 771 680 500 282 167 5591
50 S 166 362 662 1083 1671 2394 3190 3961 4641 5142 5424 5591 5591
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