BONNEVILLE DAM, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(350897) BONNEVILLE DAM
From Year=1937 To Year=2012
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	849	668	600	421	264	126	31	27	95	320	592	796	4791
60	694	527	445	276	139	40	3	3	27	179	442	641	3417
57	601	442	352	196	80	14	1	0	9	109	353	548	2705
55	539	386	292	147	50	5	0	0	4	72	294	486	2276
50	386	247	153	52	8	0	0	0	0	18	160	333	1355

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