DIABLO DAM, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(452157) DIABLO DAM
From Year=1914 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	5	14	71	216	436	580	766	777	579	295	57	8	3804
40 S	5	19	89	305	741	1321	2087	2864	3444	3739	3796	3804	3804
45 M	0	1	17	102	285	430	611	622	430	158	12	1	2669
45 S	0	1	18	120	405	835	1447	2068	2498	2656	2669	2669	2669
50 M	0	0	2	38	157	282	456	467	283	61	1	0	1747
50 S	0	0	2	40	197	479	935	1402	1685	1746	1747	1747	1747
55 M	0	0	0	9	71	154	304	313	156	16	0	0	1023
55 S	0	0	0	9	80	234	538	852	1007	1023	1023	1023	1023
60 M	0	0	0	1	24	67	169	174	67	2	0	0	505
60 S	0	0	0	1	26	93	262	436	503	505	505	505	505

Corn Growing Degree Days
50 M	1	5	39	121	239	314	452	460	321	131	11	1	2096
50 S	1	5	45	166	405	719	1172	1632	1953	2084	2095	2096	2096

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