BONNEVILLE DAM, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(350897) BONNEVILLE DAM
From Year=1948 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	847	669	600	426	267	124	34	29	99	320	586	795	4796
60	692	527	445	281	142	40	4	3	29	179	436	640	3418
57	599	443	353	200	82	14	1	0	10	110	346	547	2705
55	537	386	292	151	52	6	0	0	4	73	288	485	2274
50	384	248	152	53	9	0	0	0	0	18	154	332	1350

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