BLACKFOOT, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(100915) BLACKFOOT 2 SSW
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	1328	1072	893	579	341	136	19	34	217	553	919	1259	7349
60	1173	931	738	431	208	58	4	9	112	401	769	1104	5937
57	1080	846	645	345	143	31	1	3	69	314	679	1011	5166
55	1018	790	584	290	106	19	1	2	48	260	619	949	4684
50	863	648	431	170	42	4	0	0	16	145	470	794	3583

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