PRIEST RAPIDS DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456747) PRIEST RAPIDS DAM
From Year=1956 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	971	728	553	314	116	22	2	2	42	316	675	954	4693
60	816	587	398	179	42	3	0	0	10	183	526	799	3543
57	723	502	307	113	18	1	0	0	3	119	436	706	2928
55	662	446	248	76	9	0	0	0	1	84	378	644	2547
50	508	307	122	19	1	0	0	0	0	29	240	490	1715

Heating Degree Day units are computed as the difference between the base temperature and the daily average temperature. (Base Temp. - Daily Ave. Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is below the base temperature. Negative numbers are discarded. Example: If the days high temperature was 65 and the low temperature was 31, the base 50 heating degree day units is 50 - ((65 + 31) / 2) = 2. 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