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Flandreau September Weather

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

Typical Flandreau September Weather 1991–2020
Average daily high	72.2 °F
Average daily low	47.9 °F
Average monthly precipitation	3.1 inches
Average monthly snow	none
Daily chance of precipitation	21.0%
Daily chance of snow	0%

Flandreau September Weather Records 1893–2024
Highest temperature	104 °F	September 17, 1895
Lowest temperature	15 °F	September 29, 1899
Highest daily low	74 °F	September 14, 1939
Lowest daily high	40 °F	September 26, 1934
Hottest average high temperature	83.8 °F	1897
Coldest average high temperature	62.0 °F	1965
Most daily precipitation	4.7 inches	September 24, 1934
Most monthly precipitation	10.4 inches	2010
Most daily snow	0.3 inches	September 25, 1912
Most monthly snow	0.3 inches	1912

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	76.7	53.8	98	35
September 2	76.5	53.5	99	35
September 3	76.4	53.2	103	27
September 4	76.2	53.0	100	33
September 5	75.9	52.7	100	33
September 6	75.6	52.4	100	32
September 7	75.3	52.0	101	32
September 8	74.9	51.5	98	34
September 9	74.4	51.0	100	31
September 10	74.0	50.5	103	30
September 11	73.6	50.1	97	30
September 12	73.2	49.5	97	26
September 13	72.9	49.1	100	29
September 14	72.6	48.6	100	31
September 15	72.3	48.1	97	27
September 16	72.0	47.7	94	28
September 17	71.8	47.2	104	24
September 18	71.4	46.7	96	24
September 19	70.9	46.2	100	26
September 20	70.4	45.8	97	22
September 21	69.9	45.3	96	24
September 22	69.3	44.9	97	19
September 23	68.9	44.5	95	23
September 24	68.6	44.0	90	22
September 25	68.3	43.6	93	19
September 26	68.0	43.2	93	22
September 27	67.6	42.7	95	21
September 28	67.2	42.2	94	22
September 29	66.7	41.7	94	15
September 30	66.2	41.3	93	19

Weather Station Details

Years	Station	Coordinates
1893–2024	Flandreau	location