Sioux Falls October 21 Weather Records

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

October 21 All-Time Records 1932–2024
Highest temperature	85 °F	1947
Lowest temperature	18 °F	1976
Lowest daily high	30 °F	1936
Highest daily low	56 °F	1947
Most precipitation	0.96 inches	2009
Most snow	2.1 inches	1951

October 21 All-Time Records
1932–2024

Highest temperature

85 °F

18 °F

30 °F

Highest daily low

56 °F

0.96 inches

2.1 inches

October 21 Average Weather 1991–2020 ¹
Average high	57.6 °F
Average low	34.9 °F
Chance precipitation	23.7%
Chance snow	4.0%

October 21 Average Weather
1991–2020 ¹

Average high

57.6 °F

Average low

34.9 °F

Chance precipitation

23.7%

Chance snow

4.0%

Sioux Falls October 21 Weather by Year

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	68	40	0.00	0.0
2022	73	42	0.00	0.0
2021	53	38	0.00	0.0
2020	41	33	0.03	0.0
2019	51	42	0.44	0.0
2018	66	31	0.00	0.0
2017	73	43	0.00	0.0
2016	66	33	0.00	0.0
2015	60	37	0.00	0.0
2014	73	37	0.00	0.0
2013	50	33	0.01	0.0
2012	68	45	0.00	0.0
2011	67	27	0.00	0.0
2010	61	29	0.00	0.0
2009	47	39	0.96	0.0
2008	45	37	0.16	0.0
2007	54	46	0.08	0.0
2006	39	28	0.00	0.0
2005	57	33	0.00	0.0
2004	54	47	0.04	0.0
2003	75	39	0.00	0.0
2002	40	26	0.00	0.0
2001	64	36	0.02	0.0
2000	73	35	0.00	0.0
1999	71	37	0.00	0.0
1998	62	34	0.00	0.0
1997	43	22	0.00	0.0
1996	45	28	0.00	0.0
1995	51	26	0.00	0.0
1994	74	41	0.05	0.0
1993	54	29	0.00	0.0
1992	76	37	0.00	0.0
1991	70	35	0.00	0.0
1990	49	28	0.00	0.0
1989	71	22	0.00	0.0
1988	54	29	0.00	0.0
1987	45	20	0.00	0.0
1986	70	46	0.00	0.0
1985	56	41	0.00	0.0
1984	49	29	0.00	0.0
1983	49	43	0.00	0.0
1982	42	21	0.00	0.0
1981	44	25	0.01	0.0
1980	50	32	0.00	0.0
1979	47	36	0.06	0.0
1978	69	45	0.00	0.0
1977	65	41	0.00	0.0
1976	42	18	0.00	0.0
1975	66	34	0.00	0.0
1974	76	43	0.00	0.0
1973	76	49	0.00	0.0
1972	45	41	0.02	0.0
1971	67	37	0.00	0.0
1970	68	45	0.00	0.0
1969	59	29	0.00	0.0
1968	66	43	0.00	0.0
1967	73	24	0.00	0.0
1966	68	44	0.00	0.0
1965	59	32	0.00	0.0
1964	56	27	0.00	0.0
1963	70	51	0.16	0.0
1962	66	38	0.00	0.0
1961	68	42	0.00	0.0
1960	63	24	0.00	0.0
1959	62	40	0.88	0.0
1958	57	43	0.00	0.0
1957	53	45	0.10	0.0
1956	70	26	0.00	0.0
1955	60	27	0.00	0.0
1954	63	32	0.00	0.0
1953	71	49	0.17	0.0
1952	63	31	0.00	0.0
1951	44	31	0.27	2.1
1950	57	40	0.00	0.0
1949	39	28	0.00	0.0
1948	60	35	0.00	0.0
1947	85	56	0.00	0.0
1946	74	43	0.00	0.0
1945	64	37	0.00	0.0
1944	57	32	0.00	0.0
1943	60	31	0.00	0.0
1942	50	37	0.00	0.0
1941	68	56	0.00	0.0
1940	73	42	0.00	0.0
1939	69	47	0.00	0.0
1938	69	39	0.00	0.0
1937	40	33	0.00	0.0
1936	30	20	0.00	0.0
1935	54	33	0.00	0.0
1934	67	39	0.06	0.0
1933	50	24	0.00	0.0
1932	61	35	0.00	0.0

What's the all-time high for Sioux Falls on 10/21?

For the date of Oct 21, the highest temperature ever reached in Sioux Falls history is 85 °F which happened in 1947.

Highest Temperatures in Sioux Falls on October 21

Rank	Temperature	Year
1	85 °F	1947
2	76 °F	1974
2	76 °F	1992
2	76 °F	1973
5	75 °F	2003
6	74 °F	1994
6	74 °F	1946
8	73 °F	2022
8	73 °F	2017
8	73 °F	2000
8	73 °F	2014
8	73 °F	1940
8	73 °F	1967

What's the all-time low for Sioux Falls on 10/21?

For the date of Oct 21, the lowest temperature ever reached in Sioux Falls history is 18 °F which happened in 1976.

Lowest Temperatures in Sioux Falls on October 21

Rank	Temperature	Year
1	18 °F	1976
2	20 °F	1987
2	20 °F	1936
4	21 °F	1982
5	22 °F	1997
5	22 °F	1989
7	24 °F	1933
7	24 °F	1967
7	24 °F	1960
10	25 °F	1981

Lowest High Temperatures in Sioux Falls on October 21

Rank	Temperature	Year
1	30 °F	1936
2	39 °F	1949
2	39 °F	2006
4	40 °F	2002
4	40 °F	1937
6	41 °F	2020
7	42 °F	1976
7	42 °F	1982
9	43 °F	1997
10	44 °F	1951
10	44 °F	1981

What's the most it has ever rained in Sioux Falls on 10/21?

For the date of Oct 21, the most precipitation ever recorded in Sioux Falls history is 0.96 inches which happened in 2009.

All-Time Most Precipitation in Sioux Falls on October 21

Rank	Precipitation	Year
1	0.96 inches	2009
2	0.88 inches	1959
3	0.44 inches	2019
4	0.27 inches	1951
5	0.17 inches	1953
6	0.16 inches	2008
6	0.16 inches	1963
8	0.10 inches	1957
9	0.08 inches	2007
10	0.06 inches	1979
10	0.06 inches	1934

All-Time Most Snow in Sioux Falls on October 21

Rank	Precipitation	Year
1	2.1 inches	1951

Weather Station Details

Years	Station	Coordinates
1932–2024	Sioux Falls	location