COUPEVILLE 1 S, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451783) COUPEVILLE 1 S
From Year=1895 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	797	661	638	489	354	221	131	122	237	449	630	756	5484
60	642	520	483	339	202	86	25	20	102	294	480	601	3795
57	549	435	390	250	119	31	4	3	45	205	390	508	2929
55	487	378	328	192	73	11	1	0	22	149	331	447	2420
50	333	239	178	69	9	0	0	0	2	48	188	293	1361

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