Average Temperatures for South Dakota in September





Average temperatures for September at cities, towns and parks throughout South Dakota are listed below in degrees Fahrenheit and Celsius.

You can jump to a separate table for each region of the state: Eastern, Central and Western South Dakota.

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Eastern South Dakota

Average September temperatures
High °F Low °F Place High °C Low °C
75 47 Aberdeen 24 8
72 48 Brookings 22 9
76 50 Huron 24 10
76 53 Mitchell 25 12
76 52 Sioux Falls 24 11
78 52 Vermillion 26 11
72 49 Watertown 22 9
73 52 Waubay Wildlife Refuge 23 11
78 52 Yankton 25 11

Central South Dakota

Average daily temperatures in September
High °F Low °F Place High °C Low °C
77 51 Academy 25 10
74 50 Mobridge 24 10
78 53 Pickstown 25 11
78 50 Pierre 25 10

Western South Dakota

September temperatures: daily averages
High °F Low °F Place High °C Low °C
71 46 Custer 22 8
73 44 Deadwood 23 7
80 45 Hot Springs 27 7
82 51 Interior 28 10
72 47 Lead 22 8
77 47 Lemmon 25 9
69 50 Mt. Rushmore National Memorial 21 10
69 40 Pactola Reservoir Dam 21 4
78 45 Porcupine 26 7
76 46 Rapid City 25 8
74 48 Spearfish 23 9
76 46 Wind Cave National Park 25 8
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

South Dakota Temperatures
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