QUILLAYUTE STATE AP, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(456858) QUILLAYUTE WSCMO AP
From Year=1966 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	754	647	662	559	430	293	193	177	251	462	623	759	5811
60	599	506	507	409	279	151	63	52	117	307	473	604	4068
57	506	421	414	321	192	77	17	12	56	218	383	511	3128
55	444	365	352	263	139	39	5	3	28	162	323	449	2571
50	291	226	201	127	37	2	0	0	3	55	184	296	1422

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