NORTHPORT, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455946) NORTHPORT
From Year=1899 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	1225	981	798	488	262	101	24	42	194	552	887	1138	6692
60	1070	839	643	341	139	32	4	11	93	398	737	983	5290
57	977	754	550	257	82	13	1	4	52	309	647	890	4536
55	915	698	488	204	54	6	0	2	33	253	587	828	4067
50	760	557	334	94	12	1	0	0	8	131	438	673	3006

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