Average September Temperatures for South Dakota

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

Average Temperatures for South Dakota in September

Eastern South Dakota

Central South Dakota

Western South Dakota

Reference

More South Dakota Weather Information