NESPELEM 2 S, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455832) NESPELEM 2 S
From Year=1915 To Year=1991
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1305	1002	809	524	311	125	34	42	201	523	901	1174	6950
60	1150	860	654	376	180	45	7	9	99	370	751	1019	5520
57	1057	775	561	290	116	19	2	3	57	282	661	926	4750
55	995	719	499	236	81	9	1	1	37	228	601	864	4272
50	840	577	347	120	26	1	0	0	10	114	451	709	3195

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