SIOUX FALLS FOSS FLD, SOUTH DAKOTA

Period of Record General Climate Summary - Heating Degree Days

Station:(397667) SIOUX FALLS WSFO
From Year=1948 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	1563	1260	1024	557	242	48	7	18	171	502	956	1402	7749
60	1408	1118	870	418	136	14	1	3	86	361	806	1247	6468
57	1315	1034	778	339	88	6	0	1	52	284	717	1154	5767
55	1253	977	717	289	63	3	0	0	36	236	657	1092	5325
50	1098	836	569	180	24	0	0	0	12	138	511	937	4306

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