FORESTDALE, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(023082) FORESTDALE
From Year=1947 To Year=1971
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	7	18	58	185	397	648	883	821	611	333	69	10	4040
40 S	7	25	84	268	665	1313	2197	3017	3628	3961	4030	4040	4040
45 M	0	2	11	77	250	498	728	666	461	192	14	1	2899
45 S	0	2	14	90	340	838	1567	2232	2693	2885	2898	2899	2899
50 M	0	0	0	17	125	348	573	511	311	77	0	0	1964
50 S	0	0	1	18	142	491	1064	1575	1886	1963	1964	1964	1964
55 M	0	0	0	1	39	207	418	356	168	16	0	0	1205
55 S	0	0	0	1	40	247	665	1021	1189	1205	1205	1205	1205
60 M	0	0	0	0	5	93	264	201	59	1	0	0	624
60 S	0	0	0	0	5	99	363	564	623	624	624	624	624

Corn Growing Degree Days
50 M	33	57	114	229	374	488	561	529	443	320	121	43	3312
50 S	33	90	204	433	807	1295	1856	2386	2828	3148	3269	3312	3312

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