SWAN FALLS P H, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(108928) SWAN FALLS POWER HOUSE
From Year=1935 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	1001	737	582	341	140	35	1	3	56	295	674	959	4823
60	846	596	428	210	63	9	0	0	20	171	525	804	3672
57	753	511	338	144	34	3	0	0	9	112	435	711	3051
55	691	455	280	107	21	2	0	0	5	81	377	649	2666
50	537	317	153	38	4	0	0	0	0	29	240	495	1814

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