MONTEZUMA CASTLE NM, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025635) MONTEZUMA CASTLE N M
From Year=1938 To Year=2012
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	131	212	387	578	850	1078	1316	1256	1026	711	321	123	7990
40 S	131	343	730	1308	2159	3236	4552	5809	6834	7546	7867	7990	7990
45 M	42	104	244	430	695	928	1161	1101	876	557	188	37	6363
45 S	42	146	390	820	1516	2443	3604	4706	5582	6138	6326	6363	6363
50 M	7	34	125	289	541	778	1006	946	726	405	84	5	4945
50 S	7	41	166	455	995	1773	2779	3725	4451	4856	4940	4945	4945
55 M	1	6	46	164	388	628	851	791	576	260	24	0	3734
55 S	1	7	52	216	604	1231	2082	2874	3449	3710	3734	3734	3734
60 M	0	1	9	68	243	478	696	636	426	135	3	0	2695
60 S	0	1	10	78	321	799	1495	2131	2557	2692	2695	2695	2695

Corn Growing Degree Days
50 M	163	212	321	422	542	613	772	754	618	489	292	156	5354
50 S	163	375	696	1118	1660	2273	3045	3799	4417	4906	5198	5354	5354

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