LONGVIEW, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454769) LONGVIEW
From Year=1925 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	801	640	595	450	303	165	70	62	141	364	598	763	4952
60	646	499	440	303	169	61	12	9	48	215	448	608	3459
57	553	414	348	220	102	23	2	1	19	138	358	515	2693
55	491	358	288	169	65	10	1	0	8	95	299	453	2236
50	338	221	148	65	12	0	0	0	1	26	164	300	1274

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