SAFFORD, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(027388) SAFFORD
From Year=1898 To Year=1973
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	183	261	450	663	940	1179	1370	1299	1101	781	385	182	8795
40 S	183	445	894	1557	2497	3676	5046	6345	7446	8227	8612	8795	8795
45 M	76	142	302	513	785	1029	1215	1144	951	626	244	73	7100
45 S	76	218	520	1033	1818	2847	4062	5207	6157	6783	7028	7100	7100
50 M	18	58	170	366	631	879	1060	989	801	472	125	18	5586
50 S	18	76	246	611	1242	2121	3181	4170	4971	5443	5568	5586	5586
55 M	2	14	71	226	477	729	905	834	651	322	45	2	4277
55 S	2	16	87	313	790	1518	2423	3258	3909	4230	4275	4277	4277
60 M	0	2	19	112	327	579	750	679	501	185	9	0	3162
60 S	0	2	21	132	459	1038	1788	2468	2968	3153	3162	3162	3162

Corn Growing Degree Days
50 M	177	223	339	456	588	697	850	824	691	520	301	177	5841
50 S	177	400	739	1194	1783	2479	3329	4153	4844	5363	5664	5841	5841

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