TIDEWATER, OREGON

Period of Record General Climate Summary - Growing Degree Days

Station:(358481) TIDEWATER FISH HATCHERY
From Year=1940 To Year=2002
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	132	184	245	326	473	582	722	743	663	495	248	145	4957
40 S	132	316	561	887	1360	1942	2663	3406	4069	4564	4813	4957	4957
45 M	47	77	113	182	319	432	567	588	513	341	122	54	3353
45 S	47	123	237	419	738	1169	1736	2323	2836	3177	3299	3353	3353
50 M	8	19	34	72	173	282	412	433	363	194	38	10	2039
50 S	8	28	62	134	307	589	1000	1433	1796	1990	2028	2039	2039
55 M	1	3	5	19	67	140	257	278	215	77	5	1	1066
55 S	1	4	9	27	94	234	491	769	984	1060	1065	1066	1066
60 M	0	0	0	2	18	44	110	128	88	17	0	0	408
60 S	0	0	0	3	21	65	175	303	391	408	408	408	408

Corn Growing Degree Days
50 M	37	75	117	168	253	316	423	441	389	261	92	36	2609
50 S	37	112	229	397	650	966	1389	1831	2220	2481	2573	2609	2609

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