SEDRO WOOLLEY, WASHINGTON

Period of Record General Climate Summary - Growing Degree Days

Station:(457507) SEDRO WOOLLEY 1 E
From Year=1896 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	66	86	162	293	465	583	703	704	547	355	153	78	4194
40 S	66	152	314	607	1072	1654	2357	3062	3609	3964	4116	4194	4194
45 M	18	25	57	152	310	433	548	549	397	206	60	22	2779
45 S	18	43	100	253	563	995	1543	2093	2490	2696	2756	2779	2779
50 M	3	4	12	54	164	283	393	394	249	87	15	3	1661
50 S	3	7	19	73	237	520	913	1307	1556	1643	1658	1661	1661
55 M	0	0	1	13	60	141	239	240	115	23	2	0	835
55 S	0	1	2	15	75	216	455	694	809	832	834	835	835
60 M	0	0	0	2	15	44	101	100	30	3	0	0	296
60 S	0	0	0	2	17	61	162	262	292	296	296	296	296

Corn Growing Degree Days
50 M	14	28	69	146	248	320	418	420	304	169	46	16	2198
50 S	14	43	112	258	506	826	1244	1664	1968	2137	2182	2198	2198

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