ILLAHE, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(354133) ILLAHE
From Year=1938 To Year=2007
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	119	169	272	381	559	720	932	930	784	506	232	124	5728
40 S	119	288	559	940	1500	2220	3152	4082	4867	5372	5604	5728	5728
45 M	38	65	136	236	405	570	777	775	634	351	106	42	4136
45 S	38	103	239	475	880	1450	2227	3003	3637	3988	4094	4136	4136
50 M	6	14	46	114	257	420	622	620	484	205	29	8	2827
50 S	6	20	66	180	437	857	1480	2100	2584	2789	2818	2827	2827
55 M	0	2	9	40	133	273	467	465	336	90	4	1	1819
55 S	0	2	11	50	184	456	924	1389	1725	1814	1818	1819	1819
60 M	0	0	1	8	53	143	314	312	196	27	0	0	1054
60 S	0	0	1	9	62	205	519	831	1027	1053	1054	1054	1054

Corn Growing Degree Days
50 M	30	70	148	229	339	438	571	563	483	288	83	29	3270
50 S	30	100	248	477	816	1254	1824	2388	2870	3159	3241	3270	3270

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