JOHN MARTIN DAM, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(054388) JOHN MARTIN DAM
From Year=1941 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	1084	838	686	351	136	17	1	2	63	312	711	1030	5232
60	929	697	534	226	67	5	0	1	26	191	561	875	4113
57	836	613	446	164	41	2	0	0	14	134	472	782	3505
55	775	557	390	129	28	1	0	0	10	103	414	720	3126
50	620	419	263	65	11	0	0	0	4	50	279	566	2276

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