ASPEN, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(050370) ASPEN
From Year=1948 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	1387	1169	1116	793	524	266	94	152	349	640	1029	1344	8863
60	1232	1028	961	643	369	137	15	41	205	486	879	1189	7184
57	1139	943	868	553	279	80	3	13	131	393	789	1096	6286
55	1077	887	806	493	222	53	1	5	91	332	729	1034	5730
50	922	745	651	345	109	15	0	0	30	193	579	879	4468

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 Jul 28, 2006
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