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Sioux Falls August Weather

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

Typical Sioux Falls August Weather 1991–2020
Average daily high	81.8 °F
Average daily low	60.2 °F
Average monthly precipitation	3.3 inches
Average monthly snow	none
Daily chance of precipitation	30.3%
Daily chance of snow	0%

Sioux Falls August Weather Records 1932–2024
Highest temperature	109 °F	August 24, 1936
Lowest temperature	34 °F	August 20, 1950
Highest daily low	81 °F	August 22, 2023
Lowest daily high	57 °F	August 25, 1987
Hottest average high temperature	91.5 °F	1947
Coldest average high temperature	76.2 °F	1992
Most daily precipitation	5.4 inches	August 7, 2022
Most monthly precipitation	9.3 inches	1932
Most daily snow	none	-
Most monthly snow	none	-

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

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	83.0	61.6	102	48
August 2	82.8	61.5	105	45
August 3	82.7	61.3	104	45
August 4	82.6	61.1	107	45
August 5	82.4	60.9	99	46
August 6	82.3	60.8	99	47
August 7	82.3	60.7	99	47
August 8	82.2	60.6	100	44
August 9	82.2	60.6	105	43
August 10	82.2	60.6	104	43
August 11	82.1	60.6	99	44
August 12	82.1	60.6	97	44
August 13	82.1	60.6	101	37
August 14	82.0	60.5	99	43
August 15	81.9	60.4	106	46
August 16	81.8	60.2	101	48
August 17	81.7	60.1	101	40
August 18	81.5	60.1	101	44
August 19	81.5	60.0	98	39
August 20	81.5	59.9	99	34
August 21	81.4	59.7	98	40
August 22	81.3	59.5	103	42
August 23	81.2	59.3	100	43
August 24	80.9	59.0	109	39
August 25	80.7	58.7	103	42
August 26	80.5	58.5	108	44
August 27	80.3	58.3	101	41
August 28	80.2	58.1	100	39
August 29	80.0	58.0	100	41
August 30	79.8	57.7	104	41
August 31	79.6	57.4	95	40

Weather Station Details

Years	Station	Coordinates
1932–2024	Sioux Falls	location