SUPAI, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(028343) SUPAI
From Year=1899 To Year=1987
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	103	219	419	625	907	1162	1334	1255	1027	699	309	104	8161
40 S	103	321	740	1365	2271	3433	4767	6022	7049	7748	8056	8161	8161
45 M	34	110	274	476	752	1012	1179	1100	877	545	179	34	6570
45 S	34	143	418	893	1645	2656	3835	4935	5812	6357	6536	6570	6570
50 M	6	39	152	332	597	862	1024	945	727	394	83	7	5169
50 S	6	46	198	530	1128	1989	3013	3958	4685	5078	5162	5169	5169
55 M	1	9	65	202	445	712	869	790	577	254	27	1	3951
55 S	1	10	75	277	722	1434	2302	3092	3669	3923	3950	3951	3951
60 M	0	1	19	100	302	562	714	635	428	137	5	0	2902
60 S	0	1	20	120	421	983	1697	2332	2760	2897	2902	2902	2902

Corn Growing Degree Days
50 M	72	147	278	403	579	712	822	792	653	443	196	72	5170
50 S	72	219	497	900	1479	2191	3013	3806	4459	4902	5098	5170	5170

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