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Sioux Falls August 20 Weather Records

Daily averages and all-time records for weather in Sioux Falls, South Dakota for the date of August 20.
August 20 All-Time Records
1932–2022
Highest temperature 99 °F 1955
Lowest temperature 34 °F 1950
Lowest daily high 68 °F 1990
Highest daily low 75 °F 1959
Most precipitation 1.5 inches 2002
Most snow none -
August 20 Average Weather
1991–2020 1
Average high 81.5 °F
Average low 59.9 °F
Chance precipitation 29.5%
Chance snow 0%
Sioux Falls August 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 81 61 0.00 0.0
2021 83 66 0.23 0.0
2020 87 66 0.00 0.0
2019 89 67 0.01 0.0
2018 74 61 0.17 0.0
2017 84 62 0.00 0.0
2016 74 55 0.12 0.0
2015 79 48 0.00 0.0
2014 83 66 0.03 0.0
2013 90 66 0.00 0.0
2012 80 50 0.00 0.0
2011 74 58 0.01 0.0
2010 86 70 0.15 0.0
2009 73 56 0.08 0.0
2008 82 65 0.00 0.0
2007 81 68 0.47 0.0
2006 78 50 0.00 0.0
2005 84 56 0.00 0.0
2004 69 46 0.00 0.0
2003 90 66 1.18 0.0
2002 82 54 1.51 0.0
2001 82 62 0.00 0.0
2000 74 60 0.00 0.0
1999 82 56 0.02 0.0
1998 81 67 0.02 0.0
1997 77 52 0.00 0.0
1996 80 48 0.00 0.0
1995 85 62 0.00 0.0
1994 77 55 0.00 0.0
1993 76 59 0.00 0.0
1992 83 61 0.00 0.0
1991 85 58 0.27 0.0
1990 68 60 0.25 0.0
1989 79 56 0.03 0.0
1988 85 55 0.00 0.0
1987 82 56 0.00 0.0
1986 74 50 0.31 0.0
1985 71 51 0.02 0.0
1984 80 64 0.10 0.0
1983 94 65 0.00 0.0
1982 85 60 0.00 0.0
1981 82 60 0.00 0.0
1980 83 60 0.09 0.0
1979 82 67 0.15 0.0
1978 82 56 0.00 0.0
1977 80 53 0.36 0.0
1976 94 67 0.00 0.0
1975 90 71 0.00 0.0
1974 95 72 0.67 0.0
1973 86 57 0.00 0.0
1972 96 68 0.14 0.0
1971 89 59 0.00 0.0
1970 84 43 0.00 0.0
1969 81 62 1.30 0.0
1968 96 58 0.00 0.0
1967 91 50 0.00 0.0
1966 69 61 0.84 0.0
1965 70 60 0.01 0.0
1964 75 60 0.50 0.0
1963 89 48 0.00 0.0
1962 87 60 0.00 0.0
1961 78 56 0.09 0.0
1960 81 59 0.00 0.0
1959 93 75 0.00 0.0
1958 76 57 0.02 0.0
1957 74 62 0.31 0.0
1956 73 44 0.00 0.0
1955 99 71 0.00 0.0
1954 86 65 0.00 0.0
1953 83 54 0.00 0.0
1952 87 58 0.00 0.0
1951 74 55 0.25 0.0
1950 74 34 0.00 0.0
1949 78 50 0.00 0.0
1948 86 63 0.01 0.0
1947 98 70 0.00 0.0
1946 89 54 0.37 0.0
1945 77 63 0.00 0.0
1944 77 63 0.00 0.0
1943 82 57 0.00 0.0
1942 95 58 0.00 0.0
1941 88 59 0.00 0.0
1940 75 53 0.00 0.0
1939 69 54 0.35 0.0
1938 80 65 0.00 0.0
1937 77 61 0.11 0.0
1936 83 68 0.16 0.0
1935 86 59 0.99 0.0
1934 79 51 0.00 0.0
1933 75 57 0.00 0.0
1932 81 57 0.00 0.0
All-Time Highest Temperatures in Sioux Falls on August 20
Rank Temperature Year
1 99 °F 1955
2 98 °F 1947
3 96 °F 1968
3 96 °F 1972
5 95 °F 1942
5 95 °F 1974
7 94 °F 1983
7 94 °F 1976
9 93 °F 1959
10 91 °F 1967
All-Time Lowest Temperatures in Sioux Falls on August 20
Rank Temperature Year
1 34 °F 1950
2 43 °F 1970
3 44 °F 1956
4 46 °F 2004
5 48 °F 2015
5 48 °F 1996
5 48 °F 1963
8 50 °F 1967
8 50 °F 1986
8 50 °F 2012
8 50 °F 2006
8 50 °F 1949
Lowest High Temperatures in Sioux Falls on August 20
Rank Temperature Year
1 68 °F 1990
2 69 °F 1966
2 69 °F 1939
2 69 °F 2004
5 70 °F 1965
6 71 °F 1985
7 73 °F 1956
7 73 °F 2009
9 74 °F 2018
9 74 °F 2000
9 74 °F 1986
9 74 °F 1951
9 74 °F 1957
9 74 °F 2011
9 74 °F 2016
9 74 °F 1950
All-Time Most Precipitation in Sioux Falls on August 20
Rank Precipitation Year
1 1.5 inches 2002
2 1.3 inches 1969
3 1.2 inches 2003
4 1.0 inches 1935
5 0.8 inches 1966
6 0.7 inches 1974
7 0.5 inches 1964
8 0.5 inches 2007
9 0.4 inches 1946
10 0.4 inches 1977
Weather Station Details
Years Station Coordinates
1932–2022 Sioux Falls location