MT RUSHMORE NATL MEM, SOUTH DAKOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(395870) MT RUSHMORE NATL MEM
From Year=1962 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	1207	1034	959	681	415	153	33	47	224	546	891	1156	7345
60	1052	893	804	536	282	75	9	15	134	404	741	1001	5946
57	959	808	712	452	213	44	4	7	94	326	652	908	5179
55	897	752	651	398	172	30	2	4	72	278	594	847	4696
50	743	612	505	273	91	9	0	1	34	176	454	693	3590

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