CLEARWATER, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(451496) CLEARWATER
From Year=1895 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	787	653	650	524	403	274	175	164	233	430	614	762	5671
60	632	512	495	374	252	135	54	46	102	277	464	607	3951
57	539	427	402	286	167	66	15	13	47	189	374	514	3040
55	477	371	341	228	116	33	5	4	24	137	315	452	2503
50	324	232	191	99	28	2	0	0	2	43	175	299	1394

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