SNOQUALMIE FALLS, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(457773) SNOQUALMIE FALLS
From Year=1898 To Year=2010
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	1	2	14	61	144	274	263	117	22	2	0	900
57	0	0	1	7	39	101	215	204	77	11	1	0	656
60	0	0	0	3	18	53	135	123	36	4	0	0	372
65	0	0	0	0	4	14	46	36	6	1	0	0	106
70	0	0	0	0	1	2	11	6	1	0	0	0	20

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 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