LAKE KEECHELUS, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454414) LAKE KEECHELUS
From Year=1907 To Year=1977
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	1	1	8	57	215	409	628	631	416	177	16	2	2560
40 S	1	1	9	66	281	691	1318	1949	2365	2542	2558	2560	2560
45 M	0	0	1	18	108	266	473	476	273	77	2	0	1693
45 S	0	0	1	18	126	392	865	1341	1614	1691	1693	1693	1693
50 M	0	0	0	5	44	144	322	325	152	24	0	0	1016
50 S	0	0	0	5	49	194	515	840	992	1016	1016	1016	1016
55 M	0	0	0	1	15	64	187	190	66	5	0	0	527
55 S	0	0	0	1	16	80	267	456	523	527	527	527	527
60 M	0	0	0	0	4	21	86	88	20	0	0	0	221
60 S	0	0	0	0	4	26	112	200	220	221	221	221	221

Corn Growing Degree Days
50 M	0	1	11	48	131	217	366	375	258	111	7	0	1525
50 S	0	1	12	60	191	408	774	1149	1407	1518	1525	1525	1525

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