DARRINGTON RS, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451992) DARRINGTON RANGER STN
From Year=1911 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	948	769	700	515	338	196	93	90	215	476	738	908	5985
60	793	628	545	367	201	87	24	22	101	323	588	753	4433
57	700	544	453	281	131	42	7	6	53	237	498	660	3612
55	638	487	392	227	92	23	2	2	31	183	438	598	3114
50	483	347	244	109	27	2	0	0	5	76	291	443	2028

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