MT SPOKANE SUMMIT, WASHINGTON

Period of Record General Climate Summary - Heating Degree Days

Station:(455674) MOUNT SPOKANE SUMMIT
From Year=1953 To Year=1972
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1453	1193	1245	999	716	476	243	258	493	869	1125	1345	10417
60	1298	1052	1090	849	564	338	136	151	356	714	975	1190	8715
57	1205	967	997	760	475	261	90	102	283	622	885	1097	7745
55	1143	911	935	700	418	213	66	76	239	561	825	1035	7123
50	988	770	780	551	285	111	26	32	147	413	675	880	5659

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