ALDER DAM CAMP, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(450094) ALDER DAM CAMP
From Year=1917 To Year=1954
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	898	740	705	534	397	251	135	139	249	467	684	834	6033
60	743	599	550	385	249	121	38	38	122	315	534	679	4375
57	650	514	458	297	170	61	11	10	67	229	445	586	3498
55	588	457	396	241	124	32	4	4	41	175	385	524	2971
50	434	317	246	120	38	3	0	0	7	72	241	370	1849

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 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