MONUMENT VALLEY, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025665) MONUMENT VALLEY
From Year=1980 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	12	52	237	450	774	1068	1224	1126	868	511	128	12	6462
40 S	12	64	301	751	1524	2593	3817	4943	5811	6322	6450	6462	6462
45 M	1	14	126	312	619	918	1069	971	718	365	54	2	5169
45 S	1	16	141	453	1072	1990	3059	4030	4748	5113	5167	5169	5169
50 M	0	3	54	191	466	768	914	816	568	232	15	0	4027
50 S	0	3	56	247	713	1482	2396	3212	3780	4011	4027	4027	4027
55 M	0	1	17	96	321	619	759	661	421	122	2	0	3018
55 S	0	1	17	113	434	1053	1812	2473	2894	3016	3018	3018	3018
60 M	0	0	3	36	194	470	604	506	279	50	0	0	2142
60 S	0	0	3	39	233	703	1307	1813	2092	2142	2142	2142	2142

Corn Growing Degree Days
50 M	5	31	143	275	492	715	814	761	567	296	65	6	4170
50 S	5	36	179	454	947	1661	2476	3237	3804	4100	4164	4170	4170

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