KEYPORT, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(454187) KEYPORT TORPEDO STN
From Year=1915 To Year=1958
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	797	661	608	437	309	162	84	75	187	379	585	720	5005
60	642	520	454	289	167	51	13	10	70	229	435	565	3444
57	549	435	361	204	95	16	2	1	29	148	345	472	2659
55	487	379	301	152	57	7	1	0	14	103	286	410	2196
50	334	241	160	53	8	0	0	0	1	28	146	261	1232

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