LITTLETON, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(055056) LITTLETON
From Year=1978 To Year=1994
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1099	901	749	486	277	64	7	18	157	498	844	1115	6213
60	944	759	595	346	160	21	1	4	78	347	694	960	4908
57	851	675	504	270	108	9	0	1	49	265	604	867	4204
55	789	618	445	223	81	5	0	1	36	215	546	805	3764
50	634	480	305	128	35	1	0	0	16	119	406	651	2776

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