ILLAHE, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(354133) ILLAHE
From Year=1938 To Year=2007
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	698	549	506	370	231	85	14	13	49	274	523	681	3993
60	543	407	351	227	114	23	2	1	12	141	374	526	2721
57	450	323	261	152	63	7	0	0	4	79	285	433	2058
55	388	268	204	109	39	3	0	0	1	49	228	371	1660
50	239	139	87	34	8	0	0	0	0	9	102	224	841

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