PORTAL 4 SW, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(026186) PAINTED CANYON
From Year=1951 To Year=1965
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	45	96	200	408	631	875	966	897	742	480	156	44	5541
40 S	45	141	341	750	1381	2256	3222	4119	4862	5342	5497	5541	5541
45 M	11	33	90	263	476	725	811	742	592	328	66	9	4149
45 S	11	45	135	398	875	1599	2411	3153	3745	4073	4140	4149	4149
50 M	1	6	25	135	324	575	656	587	442	185	18	1	2955
50 S	1	7	32	167	491	1066	1722	2309	2752	2936	2954	2955	2955
55 M	0	0	3	47	179	425	501	432	293	73	2	0	1954
55 S	0	0	3	49	228	653	1154	1586	1879	1952	1954	1954	1954
60 M	0	0	0	8	66	275	346	277	152	14	0	0	1138
60 S	0	0	0	8	74	349	695	972	1124	1138	1138	1138	1138

Corn Growing Degree Days
50 M	84	139	225	350	479	561	611	575	494	360	173	96	4147
50 S	84	223	447	797	1276	1837	2448	3023	3517	3877	4050	4147	4147

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