SEDRO WOOLLEY 1 E, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(457507) SEDRO WOOLLEY 1 E
From Year=1931 To Year=2006
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	1	12	61	138	237	246	120	24	1	0	843
57	0	0	1	6	37	91	177	186	77	12	0	0	587
60	0	0	0	1	15	42	99	104	32	3	0	0	297
65	0	0	0	0	3	8	24	22	4	0	0	0	61
70	0	0	0	0	0	1	4	2	0	0	0	0	7

Cooling 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.
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