ASPEN, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(050370) ASPEN
From Year=1899 To Year=1979
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1402	1180	1116	786	528	273	99	147	345	645	1030	1330	8880
60	1247	1039	961	636	373	143	16	39	200	490	880	1175	7200
57	1154	954	868	546	283	87	3	12	127	397	790	1082	6302
55	1092	898	806	486	226	59	1	4	88	336	730	1020	5745
50	937	757	651	339	110	19	0	0	30	195	580	865	4482

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