MERWIN DAM, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(455305) MERWIN DAM
From Year=1971 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	329	1	34	83	-99	399	417	174	71	8	0	-99
57	0	326	0	21	52	-99	337	355	124	42	3	0	-99
60	0	323	0	8	25	-99	245	265	65	18	1	0	-99
65	0	320	0	1	2	-99	116	145	16	2	0	0	-99
70	0	317	0	0	0	-99	32	64	1	0	0	0	-99

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