SAPPHO 8 E, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(457319) SAPPHO 8 E
From Year=1936 To Year=1997
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	828	694	687	560	407	256	149	142	208	442	671	819	5863
60	673	553	532	410	262	129	50	43	94	289	521	664	4221
57	580	468	439	322	184	69	17	12	46	204	431	571	3343
55	518	412	377	265	137	39	6	4	24	152	371	509	2815
50	364	272	228	135	46	4	0	0	2	54	225	355	1685

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