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Period of Record General Climate Summary - Heating Degree Days

Station:(470124) ALMA DAM 4
From Year=1940 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	1521	1248	1014	529	214	39	5	15	145	441	886	1339	7394
60	1366	1106	860	389	114	10	0	2	67	303	737	1184	6138
57	1273	1022	768	311	71	3	0	0	37	230	648	1091	5454
55	1211	965	707	263	49	1	0	0	24	186	589	1029	5024
50	1056	824	558	158	17	0	0	0	6	97	446	874	4035

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