LOWER GRANITE DAM, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454835) LOWER GRANITE DAM
From Year=1965 To Year=1975
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	907	647	555	418	173	38	7	3	51	306	593	809	4508
60	752	506	401	274	78	6	2	0	16	175	443	654	3307
57	659	421	311	193	41	1	1	0	6	110	353	561	2658
55	597	365	254	143	25	0	0	0	3	76	294	499	2256
50	446	230	129	49	4	0	0	0	0	25	156	346	1385

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