SISTERS, OREGON

Period of Record General Climate Summary - Heating Degree Days

Station:(357857) SISTERS
From Year=1958 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	1046	870	822	670	478	262	106	124	295	589	850	1063	7173
60	891	729	667	520	332	146	40	47	170	435	700	908	5584
57	798	644	574	432	251	93	18	23	111	345	610	815	4714
55	736	587	512	374	202	65	9	12	80	288	551	753	4169
50	582	446	359	238	99	19	1	2	28	161	402	598	2936

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