ARLINGTON, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(450257) ARLINGTON
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	911	565	-99	433	391	226	114	119	-99	442	648	817	-99
60	756	425	-99	288	241	100	35	25	-99	290	498	662	-99
57	663	341	-99	212	155	50	11	4	-99	201	408	569	-99
55	601	285	-99	166	104	29	3	1	-99	146	348	507	-99
50	447	152	-99	73	21	3	0	0	-99	42	206	354	-99

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