South Dakota September Weather

South Dakota weather averages and all-time records in the month of September from 1991–2020 based on data made available by the NOAA.

State:

Month:

Statewide September Averages
High temperature	75.2 °F
Low temperature	47.8 °F
Precipitation	1.9 inches

South Dakota Cities

September weather averages for various places in South Dakota, from 1991–2020.

City	Average (°F)		Record (°F)		Monthly (inches)
City	High	Low	High	Low	Precipitation	Snow
Aberdeen	73.7	47.0	107	11	2.0	0.0
Brookings	72.0	48.0	102	12	3.1	0.0
Camp Crook	77.4	44.0	105	9	1.2	0.1
Flandreau	72.2	47.9	104	15	3.1	0.0
Hot Springs	79.8	45.4	103	13	1.4	0.1
Huron	75.7	49.8	106	18	2.4	0.0
Interior	81.8	51.5	106	25	1.4	0.0
Lead	70.1	46.3	96	12	2.0	1.8
Mitchell	76.6	50.9	106	11	2.3	0.0
Mobridge	74.1	50.0	107	17	1.6	0.0
Mount Rushmore	69.2	49.6	97	19	1.8	0.8
Pierre	78.0	50.1	108	21	1.7	0.0
Rapid City	76.6	46.7	104	18	1.2	0.1
Sioux Falls	74.6	51.0	104	22	2.7	0.0
Sisseton	72.7	49.8	102	22	2.6	0.0
Spearfish	75.3	49.7	105	15	1.6	0.1
Summit	72.5	47.9	97	15	2.7	0.0
Vermillion	78.7	52.1	106	23	3.0	0.0
Watertown	71.8	48.7	104	9	2.5	0.0
Winner	79.5	52.4	108	20	2.1	0.0
Yankton	77.4	51.0	105	23	2.8	0.0