FT VALLEY, ARIZONA

Period of Record General Climate Summary - Growing Degree Days

Station:(023160) FORT VALLEY
From Year=1909 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	1	2	15	82	249	487	705	655	446	179	23	2	2846
40 S	1	3	18	100	349	837	1541	2196	2642	2821	2844	2846	2846
45 M	0	0	1	23	124	340	550	500	299	74	3	0	1913
45 S	0	0	2	24	148	488	1038	1537	1836	1910	1913	1913	1913
50 M	0	0	0	3	42	202	395	345	162	17	0	0	1165
50 S	0	0	0	3	44	246	641	986	1148	1165	1165	1165	1165
55 M	0	0	0	0	8	93	241	194	58	1	0	0	596
55 S	0	0	0	0	8	101	343	536	595	596	596	596	596
60 M	0	0	0	0	1	30	104	68	9	0	0	0	211
60 S	0	0	0	0	1	31	134	202	211	211	211	211	211

Corn Growing Degree Days
50 M	12	18	50	131	263	406	471	433	345	211	75	21	2436
50 S	12	30	80	211	475	881	1352	1785	2130	2341	2415	2436	2436

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