RIO GRANDE RSVR, COLORADO

Period of Record General Climate Summary - Heating Degree Days

Station:(057050) RIO GRANDE RESERVOIR
From Year=1977 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	1596	1380	1278	977	696	413	246	301	477	781	1175	1534	10855
60	1441	1239	1123	827	541	265	104	151	327	626	1025	1379	9048
57	1348	1154	1030	737	448	181	47	79	239	533	935	1286	8017
55	1286	1097	968	677	387	133	23	46	183	471	875	1224	7371
50	1131	956	813	527	240	51	2	9	74	318	725	1069	5914

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