NORTHPORT, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455946) NORTHPORT
From Year=1920 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1212	970	787	481	251	93	19	30	181	534	884	1139	6579
60	1057	828	632	334	130	28	3	6	85	380	734	984	5198
57	964	744	539	250	76	10	1	2	47	291	644	891	4456
55	902	687	477	197	49	4	0	1	29	236	584	829	3994
50	747	546	323	88	11	0	0	0	6	118	434	674	2947

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 Jul 28, 2006
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