SMYRNA, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(457727) SMYRNA
From Year=1951 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	3	40	203	400	619	579	283	50	1	0	2179
57	0	0	1	24	156	341	557	517	230	32	1	0	1859
60	0	0	0	10	100	257	464	425	158	13	0	0	1428
65	0	0	0	2	40	135	314	275	69	2	0	0	836
70	0	0	0	0	12	56	182	146	21	0	0	0	417

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