Sioux Falls, SD: August

31 August 2026: August 2026 averaged 73.6°F in Sioux Falls, SD, the warmest August since 2023, tied 25th warmest of 132 (with 2022, 1949 and 1935).

August 2026

Mean temperature: 73.6°F; Warmest since 2023; 25th warmest of 132
Precipitation: 1.21 in; Driest since 1999; 19th driest of 133

A normal August in Sioux Falls, SD (1991 to 2020): a mean temperature of 71.2°F, between 68.1°F and 73.4°F in eight years of ten and 2.88 in of precipitation, between 1.37 in and 6.19 in in eight years of ten.

The mean temperature of every August in Sioux Falls, SD since 1893: 73.6°F in 2026; the highest is 78.8°F, in 1947.

Normal range, 68.1 to 73.4°F

Every year, ranked, as a table

Every August in Sioux Falls, SD from 1893 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	73.6	25	85.3	38	61.8	22	1.21	115	0
2025	71.1	68	80.9	102	61.3	34	2.81	65	0
2024	71.6	54	82	79	61.1	41	2.19	82	0
2023	75.5	10	86.9	19	64.2	8	4.54	30	0
2022	73.6	25	84.6	45	62.5	16	6.88	8	0
2021	74.4	18	84.6	45	64.1	10	6.29	11	0
2020	74.9	14	86.7	21	63.1	14	1.23	113	0
2019	70.3	88	80.1	112	60.5	53	2.65	70	0
2018	71.4	62	81	100	61.8	22	5.33	17	0
2017	68.1	115	78.6	122	57.6	98	5.42	16	0
2016	72.2	48	82.8	68	61.7	25	2.32	78	0
2015	69.4	101	80.2	111	58.7	88	6.57	10	0
2014	70.7	83	79.5	117	61.9	21	4.95	26	0
2013	71.7	53	81.7	86	61.6	27	3.23	56	0
2012	72.4	47	86.1	25	58.7	88	1.75	95	0
2011	71	74	81.7	86	60.4	55	1.40	103	0
2010	74.3	21	84.1	50	64.5	6	6.26	12	0
2009	68	120	78.7	120	57.2	104	1.93	87	0
2008	71.5	57	83	64	60.1	66	1.91	88	0
2007	72.6	45	82.1	76	63	15	6.18	13	0
2006	71.3	64	81.6	90	61	44	4.33	33	0
2005	70	91	80.9	102	59.1	78	1.36	107	0
2004	65.5	130	77.2	128	53.8	127	3.58	49	0
2003	73.3	31	85.4	36	61.2	36	1.82	91	0
2002	70.5	85	80.8	104	60.3	57	8.26	3	0
2001	72.2	48	83.1	62	61.2	36	1.37	105	0
2000	71.6	54	82.8	68	60.4	55	3.17	57	0
1999	70.6	84	82.3	75	58.8	85	0.80	124	0
1998	71	74	80.6	107	61.4	30	3.29	54	0
1997	68.9	106	79.7	116	58	96	1.58	99	0
1996	70	91	81.7	86	58.2	94	1.79	93	0
1995	76.8	6	87.8	15	65.9	4	5.11	23	0
1994	69.4	101	80.5	108	58.4	91	2.66	69	0
1993	71.4	62	81.5	92	61.2	36	3.10	58	0
1992	66	129	76.2	132	55.9	115	5.29	18	0
1991	72.7	41	84.8	44	60.7	49	1.41	102	0
1990	72.9	37	84.2	48	61.6	27	1.17	117	0
1989	72	51	83.2	59	60.7	49	2.46	76	0
1988	74.8	16	87.5	17	62.1	18	4.02	42	0
1987	68.8	107	80.5	108	57.1	106	1.36	107	0
1986	66.5	127	78.2	127	54.7	124	2.77	66	0
1985	66.3	128	76.9	131	55.7	119	4.07	39	0
1984	74.2	22	86	28	62.4	17	0.76	127	0
1983	78.3	3	90.9	3	65.7	5	2.00	86	0
1982	71.3	64	81.5	92	61.1	41	5.23	19	0
1981	71.1	68	81.4	95	60.8	48	2.28	80	0
1980	71	74	81.9	81	60.2	63	2.92	61	0
1979	69.9	95	78.8	119	60.9	46	4.35	32	0
1978	71.1	68	82.1	76	60	68	3.08	59	0
1977	68.1	115	78.7	120	57.5	101	5.63	14	0
1976	75.2	12	89.4	7	60.9	46	1.31	109	0
1975	72.7	41	83.4	57	62	20	9.09	2	0
1974	67.6	123	80.1	112	55.1	121	5.16	21	0
1973	76.7	7	89.7	5	63.6	13	1.05	120	0
1972	70.4	86	81.8	84	59.1	78	2.65	70	0
1971	73	35	87.8	15	58.2	94	0.71	128	0
1970	72.5	46	85.1	39	59.9	69	0.53	130	0
1969	73.2	33	86	28	60.5	53	5.07	24	0
1968	72.7	41	85.6	33	59.7	71	1.70	96	0
1967	69.9	95	83.9	53	55.8	117	3.46	50	0
1966	68.8	107	81	100	56.6	111	2.12	84	0
1965	69.4	101	81.9	81	56.8	108	1.29	111	0
1964	68.2	113	80.7	105	55.8	117	3.87	45	0
1963	70.8	79	82.6	70	58.9	83	0.94	121	0
1962	71.3	64	83.3	58	59.3	76	2.77	66	0
1961	74	23	86.6	22	61.4	30	1.79	93	0
1960	72.7	41	84.1	50	61.4	30	5.17	20	0
1959	76	8	87.9	12	64.1	10	7.47	6	0
1958	74.6	17	88.9	9	60.3	57	0.61	129	0
1957	71.1	68	82	79	60.1	66	3.76	46	0
1956	70.9	77	83.1	62	58.8	85	4.09	38	0
1955	77.9	5	91.4	2	64.4	7	1.22	114	0
1954	71.5	57	82.4	74	60.6	51	2.27	81	0
1953	73.2	33	84.5	47	61.8	22	4.26	35	0
1952	70	91	82.5	72	57.5	101	3.39	52	0
1951	69.2	105	80	115	58.4	91	2.16	83	0
1950	67.5	124	81.4	95	53.6	128	0.93	122	0
1949	73.6	25	86.1	25	61.2	36	2.69	68	0
1948	73	35	84.9	41	61.2	36	0.83	123	0
1947	78.8	1	91.5	1	66.1	2	2.32	78	0
1946	68.1	115	80.1	112	56.1	114	2.45	77	0
1945	70	91	81.1	99	58.9	83	1.49	100	0
1944	68.1	115	77.2	128	59	82	7.36	7	0
1943	70.8	79	81.4	95	60.3	57	3.90	43	0
1942	71.5	57	83.6	55	59.5	75	4.51	31	1
1941	75.1	13	88.1	11	62.1	18	0.77	126	0
1940	68.7	110	78.6	122	58.8	85	4.17	36	0
1939	69.9	95	81.4	95	58.4	91	4.04	41	0
1938	76	8	87.9	12	64.1	10	2.58	72	0
1937	78	4	89.3	8	66.7	1	5.06	25	0
1936	78.5	2	90.9	3	66.1	2	2.85	63	0
1935	73.6	25	85.8	31	61.4	30	6.84	9	0
1934	69.4	101	81.6	90	57.2	104	3.62	48	0
1933	68	120	78.5	125	57.6	98	4.70	29	0
1932	70.4	86	81.7	86	59.1	78	9.33	1	0
1931	71.9	52	84.1	50	59.7	71	2.85	63	0
1930	73.8	24	86.1	25	61.5	29	1.37	105	0
1929	70.8	79	83	64	58.6	90	1.19	116	0
1928	70.9	77	82.1	76	59.7	71	5.61	15	0
1927	67.7	122	79.5	117	55.9	115	0.78	125	0
1926	71.6	54	82.9	67	60.3	57	4.11	37	0
1925	73.4	29	86.5	23	60.3	57	1.40	103	0
1924	70.8	79	81.8	84	59.7	71	2.58	72	0
1923	69.7	98	80.3	110	59.1	78	3.88	44	0
1922	73.3	31	86	28	60.6	51	1.31	109	0
1921	71.1	68	81.9	81	60.3	57	2.97	60	0
1920	69.7	98	83	64	56.4	112	3.32	53	0
1919	71.5	57	84.9	41	58	96	0.38	132	0
1918	72.9	37	84.2	48	61.7	25	3.71	47	0
1917	68.5	111	82.5	72	54.5	125	1.16	119	0
1916	72.1	50	84.9	41	59.3	76	1.83	90	0
1915	63.7	132	75.3	133	52.1	132	1.81	92	0
1914	70.1	90	82.6	70	57.6	98	2.49	74	0
1913	74.4	18	87.9	12	61	44	1.44	101	0
1912	68.3	112	80.7	105	55.5	120	4.30	34	2
1911	68.2	113	81.5	92	54.8	123	8.07	5	0
1910	71.5	57	83.2	59	59.8	70	3.40	51	0
1909	75.5	10	86.9	19	64.2	8	4.05	40	0
1908	68.1	115	83.2	59	53.1	129	1.89	89	0
1907	71.3	64	85.1	39	57.5	101	0.36	133	0
1906	72.8	40	85.4	36	60.2	63	8.08	4	0
1905	74.4	18	87.5	17	61.3	34	4.73	28	0
1904			83.5	56			1.62	98	4
1903	67	126	77.2	128	56.8	108	5.13	22	0
1902	67.3	125	78.3	126	56.4	112	4.85	27	0
1901	73.4	29	85.7	32	61.1	41	2.02	85	0
1900	74.9	14	89.6	6	60.2	63	3.26	55	0
1899									14
1898	70.3	88	85.5	34	55	122	1.67	97	0
1897	65.4	131	78.6	122	52.3	131	2.90	62	0
1896	71.1	68	85.5	34	56.8	108	1.17	117	0
1895	69.7	98	86.5	23	53	130	0.48	131	0
1894	72.9	37	88.9	9	56.9	107	1.29	111	0
1893	68.8	107	83.7	54	53.9	126	2.48	75	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1947	78.8
1936	78.5
1983	78.3
1937	78
1955	77.9
1995	76.8
1973	76.7
1959	76
1938	76
2023	75.5
More years share the last value

Coldest
Year	Mean, °F
1915	63.7
1897	65.4
2004	65.5
1992	66
1985	66.3
1986	66.5
1903	67
1902	67.3
1950	67.5
1974	67.6

Wettest
Year	Precipitation, in
1932	9.33
1975	9.09
2002	8.26
1906	8.08
1911	8.07
1959	7.47
1944	7.36
2022	6.88
1935	6.84
2015	6.57

Driest
Year	Precipitation, in
1907	0.36
1919	0.38
1895	0.48
1970	0.53
1958	0.61
1971	0.71
1984	0.76
1941	0.77
1927	0.78
1999	0.80

The hottest, coldest and wettest days

Hottest day: 98°F; 30 August 2026
Coldest night: 49°F; 5 August 2026
Wettest day: 0.75 in; 13 August 2026

Every month, season and year

Months

Seasons

Years

Sioux Falls, SD the day's answers

All-time records

Every answer in words

August 2026 brought 1.21 in of precipitation in Sioux Falls, SD, the driest August since 1999, 19th driest of 133.
The hottest day of August 2026 in Sioux Falls, SD: 98°F on Sunday 30 August 2026.
The coldest night of August 2026 in Sioux Falls, SD: a low of 49°F on Wednesday 5 August 2026.
The wettest day of August 2026 in Sioux Falls, SD: 0.75 in on Thursday 13 August 2026.