DIABLO DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(452157) DIABLO DAM
From Year=1931 To Year=2006
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	6	15	74	218	441	582	764	775	581	300	58	9	3824
40 S	6	21	95	313	754	1336	2100	2875	3456	3756	3814	3824	3824
45 M	0	1	18	104	291	432	609	620	431	163	12	1	2682
45 S	0	1	19	123	414	846	1456	2076	2507	2669	2681	2682	2682
50 M	0	0	2	39	163	284	455	465	284	65	1	0	1758
50 S	0	0	2	42	204	489	943	1408	1693	1757	1758	1758	1758
55 M	0	0	0	10	76	156	303	312	158	18	0	0	1033
55 S	0	0	0	10	86	243	545	857	1015	1033	1033	1033	1033
60 M	0	0	0	2	27	70	170	175	69	2	0	0	515
60 S	0	0	0	2	29	99	269	443	512	515	515	515	515

Corn Growing Degree Days
50 M	1	5	41	121	239	313	449	458	320	134	11	1	2093
50 S	1	6	47	167	407	720	1169	1627	1947	2081	2092	2093	2093

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 Jul 28, 2006
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