SOUTH OLYMPIC TREE F, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457871) SOUTH OLYMPIC TREE FARM
From Year=1945 To Year=1956
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	898	742	731	549	354	247	145	144	223	444	665	802	5942
60	743	600	576	399	213	119	44	39	107	292	515	647	4294
57	650	516	483	313	141	62	12	11	56	207	425	554	3430
55	588	459	422	257	100	35	3	3	32	155	366	492	2913
50	433	318	270	132	29	5	0	0	4	58	223	338	1810

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