RIFLE, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(057031) RIFLE
From Year=1910 To Year=2007
Heating Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
65	1299	983	808	516	273	72	3	11	155	491	860	1212	6685
60	1144	842	653	368	144	23	0	1	63	338	710	1057	5343
57	1051	757	560	282	88	10	0	0	33	250	620	964	4616
55	989	700	499	229	61	6	0	0	20	197	560	902	4164
50	834	559	347	119	21	1	0	0	5	92	411	747	3136

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