INCHELIUM 2 NW, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(453903) INCHELIUM 2 NW
From Year=1940 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	1233	966	860	559	315	133	41	50	219	587	905	1146	7013
60	1078	825	705	410	183	49	8	10	111	432	755	991	5557
57	985	740	612	322	119	21	3	3	65	341	665	898	4772
55	923	683	550	264	85	11	1	1	42	282	605	836	4282
50	768	542	395	136	27	1	0	0	10	152	455	681	3168

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