BOISE AIR TERMINAL, IDAHO

Period of Record General Climate Summary - Heating Degree Days

Station:(101022) BOISE WSFO AIRPORT
From Year=1940 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	1090	821	694	465	250	83	7	15	120	401	762	1044	5754
60	935	680	539	324	141	30	1	3	54	262	612	889	4470
57	842	595	447	246	90	14	0	1	30	190	523	796	3773
55	780	539	387	198	63	7	0	0	20	149	463	734	3339
50	625	398	245	97	20	1	0	0	5	69	321	580	2362

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