LAKE KEECHELUS, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(454414) LAKE KEECHELUS
From Year=1931 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	7	55	216	404	619	616	420	173	16	1	2530
40 S	1	2	9	64	280	684	1303	1919	2340	2513	2529	2530	2530
45 M	0	0	0	17	109	261	465	461	277	77	2	0	1670
45 S	0	0	1	17	127	388	852	1314	1591	1668	1670	1670	1670
50 M	0	0	0	5	46	141	314	310	155	25	0	0	996
50 S	0	0	0	5	50	192	506	816	971	996	996	996	996
55 M	0	0	0	1	15	63	183	178	69	5	0	0	515
55 S	0	0	0	1	17	80	263	441	509	515	515	515	515
60 M	0	0	0	0	5	21	86	81	22	1	0	0	216
60 S	0	0	0	0	5	26	112	193	215	216	216	216	216

Corn Growing Degree Days
50 M	0	1	10	46	132	211	359	364	265	112	7	0	1507
50 S	0	1	11	58	189	400	759	1123	1389	1500	1507	1507	1507

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