DEER PARK AP, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(452066) DEER PARK 2 E
From Year=1911 To Year=1977
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1270	1009	874	585	357	183	58	87	280	601	917	1167	7387
60	1115	867	719	436	218	81	15	26	157	447	767	1012	5859
57	1022	783	626	349	147	41	5	10	99	356	677	919	5033
55	960	726	564	292	108	23	2	5	69	298	617	857	4520
50	805	585	409	164	39	3	0	0	21	166	467	702	3362

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