COULEE DAM 1 SW, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(451767) COULEE DAM 1 SW
From Year=1948 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	4	14	88	292	558	765	1006	982	697	333	51	6	4795
40 S	4	18	106	397	955	1721	2727	3709	4406	4739	4789	4795	4795
45 M	0	2	25	160	404	615	851	827	547	197	12	1	3642
45 S	0	2	27	187	591	1207	2058	2885	3432	3629	3641	3642	3642
50 M	0	0	4	69	259	465	696	672	399	94	2	0	2660
50 S	0	0	4	73	332	797	1493	2165	2565	2659	2660	2660	2660
55 M	0	0	0	22	140	319	541	517	260	35	0	0	1834
55 S	0	0	0	22	162	481	1022	1539	1799	1834	1834	1834	1834
60 M	0	0	0	5	60	187	388	365	144	9	0	0	1159
60 S	0	0	0	5	65	252	641	1005	1149	1159	1159	1159	1159

Corn Growing Degree Days
50 M	0	5	49	171	326	470	640	624	426	177	12	1	2900
50 S	0	5	54	225	551	1020	1660	2284	2710	2888	2900	2900	2900

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