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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
1932–2022
Highest temperature 93 °F 1937
Lowest temperature 27 °F 1934
Lowest daily high 46 °F 1995
Highest daily low 63 °F 2016
Most precipitation 1.7 inches 1959
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%
Sioux Falls September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
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
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
All-Time Highest Temperatures in Sioux Falls on September 21
Rank Temperature Year
1 93 °F 1937
2 92 °F 2005
3 90 °F 1936
4 88 °F 2016
4 88 °F 1956
6 86 °F 2017
7 85 °F 1984
8 84 °F 2020
9 83 °F 1941
9 83 °F 1935
All-Time Lowest Temperatures in Sioux Falls on September 21
Rank Temperature Year
1 27 °F 1934
2 29 °F 2000
2 29 °F 1999
2 29 °F 1983
5 32 °F 1974
5 32 °F 1997
5 32 °F 1995
8 33 °F 1982
9 35 °F 1951
9 35 °F 2013
Lowest High Temperatures in Sioux Falls on September 21
Rank Temperature Year
1 46 °F 1995
2 51 °F 1965
3 54 °F 1971
4 55 °F 1934
4 55 °F 1983
4 55 °F 1985
7 56 °F 1998
7 56 °F 1951
9 57 °F 2006
10 58 °F 1953
All-Time Most Precipitation in Sioux Falls on September 21
Rank Precipitation Year
1 1.7 inches 1959
2 1.3 inches 2006
3 0.7 inches 1940
4 0.5 inches 1950
5 0.4 inches 1986
6 0.3 inches 2003
6 0.3 inches 1965
8 0.2 inches 2009
8 0.2 inches 1971
10 0.2 inches 1969
Weather Station Details
Years Station Coordinates
1932–2022 Sioux Falls location