POWELL, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(107320) POWELL
From Year=1962 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	1268	1045	953	721	495	259	93	113	338	677	1000	1279	8241
60	1113	903	798	571	347	144	32	44	206	522	850	1124	6654
57	1020	819	705	481	265	92	14	21	141	430	760	1031	5779
55	958	762	643	423	214	64	7	12	104	370	700	969	5227
50	803	621	488	280	109	20	1	2	41	230	550	814	3960

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