APACHE POWDER COMPNY, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(020309) APACHE POWDER COMPANY
From Year=1923 To Year=1990
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	193	255	413	622	857	1108	1261	1196	1016	737	370	201	8230
40 S	193	448	861	1483	2340	3448	4710	5906	6922	7659	8029	8230	8230
45 M	83	140	267	473	702	958	1106	1041	866	582	231	87	6537
45 S	83	223	490	963	1665	2623	3730	4771	5637	6219	6450	6537	6537
50 M	21	57	143	327	547	808	951	886	716	429	114	23	5022
50 S	21	78	221	548	1095	1903	2855	3741	4457	4885	4999	5022	5022
55 M	3	14	56	193	393	658	796	731	566	280	35	3	3727
55 S	3	16	72	264	658	1316	2113	2844	3410	3690	3725	3727	3727
60 M	0	1	12	84	246	508	641	576	416	147	4	0	2637
60 S	0	1	13	97	343	851	1493	2069	2485	2632	2636	2637	2637

Corn Growing Degree Days
50 M	206	244	337	450	552	651	789	765	633	502	324	221	5676
50 S	206	450	787	1238	1790	2441	3230	3995	4629	5130	5454	5676	5676

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