DARRINGTON RANGER STN, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451992) DARRINGTON RANGER STN
From Year=1931 To Year=2006
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	953	761	698	513	330	194	93	88	210	470	736	893	5939
60	798	620	543	365	195	87	25	22	98	318	586	738	4395
57	705	536	451	280	127	43	8	6	51	232	496	645	3578
55	643	479	390	226	88	23	3	2	30	179	436	583	3082
50	488	339	242	109	25	2	0	0	5	74	289	428	2003

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