CLEARWATER, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451496) CLEARWATER
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	775	642	645	521	397	275	180	167	230	426	613	758	5629
60	620	500	490	371	247	136	57	48	100	272	463	603	3907
57	527	416	397	283	163	66	17	14	46	186	373	510	2996
55	465	359	335	225	113	33	6	5	24	134	313	448	2461
50	312	221	185	96	27	2	0	0	2	43	174	295	1358

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