BLACKFOOT, IDAHO

Period of Record General Climate Summary - Cooling Degree Days

Station:(100915) BLACKFOOT 2 SSW
From Year=1895 To Year=2012
Cooling Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
55	0	0	0	11	81	227	460	396	147	17	0	0	1342
57	0	0	0	6	55	179	399	336	108	9	0	0	1094
60	0	0	0	2	28	117	308	249	62	3	0	0	769
65	0	0	0	0	6	44	169	119	17	0	0	0	355
70	0	0	0	0	1	10	62	33	3	0	0	0	109

Cooling Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. 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