PRIEST RAPIDS DAM, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(456747) PRIEST RAPIDS DAM
From Year=1956 To Year=2012
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	5	64	261	469	717	691	403	85	3	0	2699
57	0	0	2	41	208	410	655	629	345	58	1	0	2350
60	0	0	0	18	140	322	562	536	261	29	0	0	1870
65	0	0	0	4	60	190	409	382	141	7	0	0	1193
70	0	0	0	1	19	92	262	238	58	0	0	0	669

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