SILVERTON, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(357823) SILVERTON
From Year=1962 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	85	117	203	295	485	631	821	831	672	417	180	81	4817
40 S	85	201	404	699	1184	1815	2636	3467	4138	4555	4736	4817	4817
45 M	27	39	84	157	331	481	666	676	522	266	78	25	3353
45 S	27	66	151	308	639	1120	1786	2462	2983	3250	3328	3353	3353
50 M	5	7	23	63	188	332	511	521	372	135	21	5	2182
50 S	5	12	35	98	286	618	1129	1650	2022	2157	2178	2182	2182
55 M	0	1	3	20	87	190	356	366	227	50	3	0	1303
55 S	0	1	3	23	111	301	657	1023	1250	1300	1303	1303	1303
60 M	0	0	0	4	34	87	207	215	109	12	0	0	670
60 S	0	0	0	4	38	125	332	548	657	669	670	670	670

Corn Growing Degree Days
50 M	19	40	85	139	253	350	501	512	391	207	57	18	2571
50 S	19	60	145	283	536	887	1388	1900	2290	2497	2553	2571	2571

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