SEQUIM 2 E, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457544) SEQUIM 2 E
From Year=1980 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	806	710	686	561	408	260	167	161	290	517	681	826	6072
60	651	569	531	411	255	124	50	45	148	362	531	671	4348
57	558	485	438	321	170	60	15	13	78	270	441	578	3427
55	496	428	377	262	120	29	5	4	44	211	381	516	2874
50	342	288	225	126	32	2	0	0	6	85	235	361	1701

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