LOWER MONUMENTAL DAM, WASHINGTON

Period of Record General Climate Summary - Cooling Degree Days

Station:(454841) LOWER MONUMENTAL DAM
From Year=1962 To Year=2007
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	33	201	417	661	644	359	75	1	0	2397
57	0	0	2	19	155	359	599	582	303	50	1	0	2069
60	0	0	0	7	99	274	506	489	223	25	0	0	1624
65	0	0	0	1	38	155	354	339	114	6	0	0	1006
70	0	0	0	0	10	72	216	208	46	0	0	0	553

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