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Spearfish September Weather

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

Typical Spearfish September Weather 1991–2020
Average daily high	75.3 °F
Average daily low	49.7 °F
Average monthly precipitation	1.6 inches
Average monthly snow	0.1 inches
Daily chance of precipitation	19.6%
Daily chance of snow	0.38%

Spearfish September Weather Records 1893–2024
Highest temperature	105 °F	September 7, 1978
Lowest temperature	15 °F	September 25, 1926
Highest daily low	79 °F	September 4, 2002
Lowest daily high	33 °F	September 25, 1934
Hottest average high temperature	83.8 °F	1936
Coldest average high temperature	59.9 °F	1912
Most daily precipitation	3.0 inches	September 28, 1923
Most monthly precipitation	6.2 inches	1923
Most daily snow	8.0 inches	September 16, 1965
Most monthly snow	11.0 inches	1903

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	81.1	54.6	102	38
September 2	80.8	54.3	99	38
September 3	80.6	54.0	99	35
September 4	80.3	53.7	101	30
September 5	79.8	53.3	97	33
September 6	79.3	53.0	103	34
September 7	78.8	52.5	105	30
September 8	78.3	52.1	100	29
September 9	77.9	51.7	98	28
September 10	77.4	51.3	96	29
September 11	77.0	50.9	96	29
September 12	76.5	50.6	97	30
September 13	76.1	50.3	95	27
September 14	75.8	49.9	97	28
September 15	75.4	49.6	99	29
September 16	75.1	49.3	92	27
September 17	74.8	49.0	95	26
September 18	74.2	48.5	94	26
September 19	73.6	48.1	93	27
September 20	72.9	47.6	93	25
September 21	72.3	47.2	93	28
September 22	71.7	46.8	92	22
September 23	71.2	46.3	92	27
September 24	70.7	45.9	90	20
September 25	70.2	45.5	95	15
September 26	69.6	45.0	95	20
September 27	69.1	44.7	93	24
September 28	68.6	44.2	90	21
September 29	68.1	43.8	92	23
September 30	67.5	43.5	90	21

Weather Station Details

Years	Station	Coordinates
1893–2024	Spearfish	location