RALSTON RSVR, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(056816) RALSTON RESERVOIR
From Year=1978 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	955	890	736	534	282	70	7	16	132	444	719	997	5783
60	800	749	582	392	173	29	2	5	65	306	571	842	4515
57	707	664	494	314	124	16	1	2	41	233	485	749	3829
55	646	607	436	265	98	10	0	1	30	191	430	687	3403
50	494	469	303	162	51	3	0	0	13	109	304	535	2443

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