NESPELEM 2 S, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455832) NESPELEM 2 S
From Year=1931 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	1285	990	810	510	305	120	35	39	191	508	894	1150	6838
60	1130	848	655	363	175	42	7	8	93	355	744	995	5416
57	1037	763	562	277	112	17	2	2	53	268	655	902	4652
55	975	707	500	224	79	8	1	1	34	214	595	840	4178
50	820	565	347	111	24	1	0	0	8	105	445	685	3111

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