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Sioux Falls September Weather

Averages and records for weather in Sioux Falls, South Dakota in the month of September.

Typical Sioux Falls September Weather 1991–2020
Average daily high	74.6 °F
Average daily low	51.0 °F
Average monthly precipitation	2.7 inches
Average monthly snow	none
Daily chance of precipitation	27.0%
Daily chance of snow	0%

Sioux Falls September Weather Records 1932–2024
Highest temperature	104 °F	September 6, 1976
Lowest temperature	22 °F	September 30, 1974
Highest daily low	77 °F	September 14, 1939
Lowest daily high	41 °F	September 28, 1985
Hottest average high temperature	82.6 °F	2023
Coldest average high temperature	60.1 °F	1965
Most daily precipitation	4.0 inches	September 11, 1966
Most monthly precipitation	9.3 inches	1986
Most daily snow	0.9 inches	September 28, 1985
Most monthly snow	0.9 inches	1985

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
September 1	79.4	57.1	96	36
September 2	79.2	56.8	101	36
September 3	79.0	56.6	97	31
September 4	78.7	56.3	100	36
September 5	78.4	56.0	98	35
September 6	78.1	55.6	104	34
September 7	77.6	55.1	100	37
September 8	77.2	54.6	98	36
September 9	76.8	54.1	95	37
September 10	76.4	53.6	95	36
September 11	76.0	53.1	96	34
September 12	75.6	52.6	96	35
September 13	75.3	52.2	96	33
September 14	74.9	51.6	97	33
September 15	74.6	51.2	99	30
September 16	74.4	50.8	96	35
September 17	74.0	50.2	94	33
September 18	73.6	49.8	94	30
September 19	73.1	49.3	95	27
September 20	72.5	48.8	95	30
September 21	72.0	48.3	93	27
September 22	71.6	47.9	94	24
September 23	71.3	47.6	92	27
September 24	71.0	47.2	89	29
September 25	70.6	46.7	92	28
September 26	70.2	46.2	94	23
September 27	69.8	45.7	96	28
September 28	69.3	45.3	89	24
September 29	68.9	44.8	89	26
September 30	68.3	44.4	93	22

Weather Station Details

Years	Station	Coordinates
1932–2024	Sioux Falls	location