Sioux Falls September 21 Weather Records

Daily averages and all-time records for weather in Sioux Falls, South Dakota for the date of September 21.

September 21 All-Time Records
1932–2024

93 °F

27 °F

46 °F

Highest daily low

63 °F

1.70 inches

Most snow

none

September 21 Average Weather
1991–2020 ¹

Average high

72.0 °F

Average low

48.3 °F

Chance precipitation

27.6%

Chance snow

0.1%

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	73	60	0.18	0.0
2022	71	49	0.00	0.0
2021	69	45	0.00	0.0
2020	84	61	0.00	0.0
2019	82	57	0.02	0.0
2018	59	45	0.00	0.0
2017	86	49	0.00	0.0
2016	88	63	0.00	0.0
2015	81	58	0.00	0.0
2014	72	47	0.00	0.0
2013	75	35	0.00	0.0
2012	71	45	0.00	0.0
2011	61	40	0.00	0.0
2010	72	51	0.16	0.0
2009	67	52	0.21	0.0
2008	81	60	0.00	0.0
2007	77	46	0.15	0.0
2006	57	50	1.32	0.0
2005	92	62	0.00	0.0
2004	64	56	0.16	0.0
2003	71	50	0.30	0.0
2002	64	44	0.00	0.0
2001	73	47	0.00	0.0
2000	61	29	0.05	0.0
1999	68	29	0.00	0.0
1998	56	42	0.01	0.0
1997	62	32	0.01	0.0
1996	67	48	0.00	0.0
1995	46	32	0.00	0.0
1994	78	47	0.15	0.0
1993	73	51	0.00	0.0
1992	78	45	0.00	0.0
1991	72	47	0.00	0.0
1990	72	47	0.00	0.0
1989	73	53	0.00	0.0
1988	78	47	0.00	0.0
1987	67	46	0.00	0.0
1986	80	60	0.38	0.0
1985	55	38	0.12	0.0
1984	85	55	0.00	0.0
1983	55	29	0.00	0.0
1982	64	33	0.00	0.0
1981	75	51	0.00	0.0
1980	75	44	0.15	0.0
1979	66	37	0.00	0.0
1978	68	36	0.00	0.0
1977	68	55	0.19	0.0
1976	72	41	0.00	0.0
1975	61	37	0.00	0.0
1974	61	32	0.00	0.0
1973	70	50	0.10	0.0
1972	65	36	0.00	0.0
1971	54	45	0.21	0.0
1970	73	53	0.09	0.0
1969	79	56	0.20	0.0
1968	78	59	0.00	0.0
1967	67	42	0.00	0.0
1966	78	47	0.00	0.0
1965	51	36	0.30	0.0
1964	66	46	0.00	0.0
1963	73	50	0.00	0.0
1962	72	51	0.00	0.0
1961	74	48	0.00	0.0
1960	68	54	0.15	0.0
1959	82	58	1.70	0.0
1958	77	41	0.00	0.0
1957	66	41	0.02	0.0
1956	88	48	0.00	0.0
1955	76	53	0.00	0.0
1954	60	38	0.00	0.0
1953	58	37	0.00	0.0
1952	67	40	0.10	0.0
1951	56	35	0.00	0.0
1950	64	51	0.54	0.0
1949	70	47	0.00	0.0
1948	69	57	0.01	0.0
1947	71	38	0.00	0.0
1946	79	53	0.00	0.0
1945	72	46	0.00	0.0
1944	68	48	0.00	0.0
1943	71	51	0.00	0.0
1942	n/a	n/a	n/a	n/a
1941	83	61	0.11	0.0
1940	80	63	0.71	0.0
1939	82	55	0.00	0.0
1938	74	44	0.00	0.0
1937	93	63	0.00	0.0
1936	90	59	0.00	0.0
1935	83	48	0.00	0.0
1934	55	27	0.03	0.0
1933	77	51	0.00	0.0
1932	65	51	0.00	0.0

What's the all-time high for Sioux Falls on 9/21?

For the date of Sep 21, the highest temperature ever reached in Sioux Falls history is 93 °F which happened in 1937.

Highest Temperatures in Sioux Falls on September 21

What's the all-time low for Sioux Falls on 9/21?

For the date of Sep 21, the lowest temperature ever reached in Sioux Falls history is 27 °F which happened in 1934.

Lowest Temperatures in Sioux Falls on September 21

Lowest High Temperatures in Sioux Falls on September 21

What's the most it has ever rained in Sioux Falls on 9/21?

For the date of Sep 21, the most precipitation ever recorded in Sioux Falls history is 1.70 inches which happened in 1959.

All-Time Most Precipitation in Sioux Falls on September 21

Weather Station Details

Years	Station	Coordinates
1932–2024	Sioux Falls	location