TROUTDALE, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358634) TROUTDALE SUBSTATION
From Year=1948 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	78	115	223	345	531	680	858	856	687	447	198	80	5100
40 S	78	193	416	761	1292	1972	2831	3687	4374	4821	5019	5100	5100
45 M	23	36	97	201	376	530	703	701	537	295	87	22	3609
45 S	23	59	156	357	733	1263	1966	2667	3205	3499	3586	3609	3609
50 M	4	7	27	88	228	380	548	546	387	157	23	3	2398
50 S	4	10	38	125	353	733	1282	1828	2216	2372	2395	2398	2398
55 M	0	0	4	28	111	234	393	391	242	60	3	0	1468
55 S	0	1	5	33	144	378	772	1163	1405	1465	1468	1468	1468
60 M	0	0	0	6	44	116	241	239	118	15	0	0	779
60 S	0	0	0	7	50	166	407	646	764	779	779	779	779

Corn Growing Degree Days
50 M	19	38	102	179	292	392	529	528	414	233	66	18	2809
50 S	19	57	159	337	629	1021	1551	2079	2492	2725	2791	2809	2809

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