MT TRUMBULL, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(025744) MOUNT TRUMBULL
From Year=1919 To Year=1977
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	58	71	153	230	550	835	1081	991	749	438	97	8	5261
40 S	58	129	282	512	1061	1896	2977	3968	4717	5156	5253	5261	5261
45 M	4	22	62	124	398	685	926	836	599	313	24	0	3993
45 S	4	26	87	212	610	1294	2220	3056	3656	3969	3993	3993	3993
50 M	0	4	15	46	255	535	771	681	449	207	2	0	2965
50 S	0	4	19	65	320	855	1626	2307	2756	2963	2965	2965	2965
55 M	0	0	3	9	133	387	616	526	299	116	0	0	2089
55 S	0	0	3	12	145	532	1148	1674	1974	2089	2089	2089	2089
60 M	0	0	0	0	50	248	462	371	157	42	0	0	1329
60 S	0	0	0	0	50	297	759	1130	1287	1329	1329	1329	1329

Corn Growing Degree Days
50 M	65	60	121	193	363	540	694	650	488	297	107	24	3602
50 S	65	125	246	439	802	1342	2036	2686	3174	3471	3578	3602	3602

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