PHOENIX INDIAN SCH, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026476) PHOENIX INDIAN SCHOOL
From Year=1920 To Year=1975
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	249	389	614	775	1027	1234	1519	1482	1229	859	489	270	10135
40 S	249	638	1252	2027	3054	4288	5807	7288	8517	9376	9865	10135	10135
45 M	118	254	459	625	872	1084	1364	1327	1079	704	343	135	8362
45 S	118	372	831	1456	2328	3411	4775	6102	7180	7885	8227	8362	8362
50 M	38	134	307	475	717	934	1209	1172	929	550	206	42	6712
50 S	38	172	479	955	1672	2605	3814	4986	5914	6464	6670	6712	6712
55 M	8	49	169	331	562	784	1054	1017	779	398	95	4	5249
55 S	8	57	226	557	1119	1902	2956	3973	4752	5149	5244	5249	5249
60 M	2	12	64	199	408	634	899	862	629	256	28	0	3992
60 S	2	14	78	277	685	1318	2217	3079	3707	3963	3991	3992	3992

Corn Growing Degree Days
50 M	219	263	406	496	619	723	939	920	766	557	357	237	6500
50 S	219	482	888	1384	2003	2726	3665	4585	5350	5907	6264	6500	6500

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