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Rapid City September 21 Weather Records

Daily averages and all-time records for weather in Rapid City, South Dakota for the date of September 21.
September 21 All-Time Records
1948–2022
Highest temperature 92 °F 2013
Lowest temperature 23 °F 1995
Lowest daily high 43 °F 1995
Highest daily low 53 °F 2017
Most precipitation 0.4 inches 1998
Most snow none -
September 21 Average Weather
1991–2020 1
Average high 73.2 °F
Average low 44.1 °F
Chance precipitation 23.0%
Chance snow 0.8%
Rapid City September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 61 47 0.14 n/a
2021 68 37 0.00 n/a
2020 80 46 0.00 n/a
2019 67 41 0.00 n/a
2018 62 38 0.00 0.0
2017 78 53 0.00 0.0
2016 75 50 0.00 0.0
2015 87 45 0.00 0.0
2014 74 42 0.00 0.0
2013 92 39 0.00 0.0
2012 79 43 0.00 0.0
2011 65 37 0.00 0.0
2010 75 43 0.00 0.0
2009 59 48 0.00 0.0
2008 84 53 0.00 0.0
2007 73 45 0.00 0.0
2006 65 39 0.06 0.0
2005 88 52 0.00 n/a
2004 50 44 0.06 n/a
2003 66 39 0.03 n/a
2002 57 36 0.01 n/a
2001 81 41 0.00 n/a
2000 66 41 0.00 0.0
1999 77 37 0.00 0.0
1998 51 40 0.45 0.0
1997 58 49 0.00 0.0
1996 66 37 0.00 0.0
1995 43 23 0.00 0.0
1994 64 38 0.03 0.0
1993 65 49 0.00 0.0
1992 73 47 0.00 0.0
1991 84 41 0.00 0.0
1990 73 41 0.00 0.0
1989 61 44 0.30 0.0
1988 68 44 0.00 0.0
1987 73 37 0.00 0.0
1986 61 49 0.00 0.0
1985 71 40 0.00 0.0
1984 84 42 0.07 0.0
1983 57 25 0.02 0.0
1982 77 36 0.00 0.0
1981 76 41 0.00 0.0
1980 69 45 0.00 0.0
1979 81 40 0.00 0.0
1978 68 35 0.00 0.0
1977 66 43 0.00 0.0
1976 80 50 0.00 0.0
1975 67 32 0.00 0.0
1974 66 36 0.00 0.0
1973 71 45 0.06 0.0
1972 75 30 0.00 0.0
1971 49 35 0.00 0.0
1970 68 39 0.00 0.0
1969 75 51 0.03 0.0
1968 75 52 0.00 0.0
1967 81 45 0.00 0.0
1966 75 49 0.00 0.0
1965 64 41 0.02 0.0
1964 67 43 0.00 0.0
1963 65 49 0.34 0.0
1962 75 49 0.00 0.0
1961 54 43 0.00 0.0
1960 66 42 0.01 0.0
1959 71 48 0.00 0.0
1958 85 39 0.00 0.0
1957 58 38 0.02 0.0
1956 70 49 0.00 0.0
1955 63 42 0.00 0.0
1954 69 29 0.00 0.0
1953 70 32 0.00 0.0
1952 66 45 0.00 0.0
1951 53 34 0.00 0.0
1950 69 47 0.00 0.0
1949 76 41 0.00 0.0
1948 83 44 0.00 0.0
All-Time Highest Temperatures in Rapid City on September 21
Rank Temperature Year
1 92 °F 2013
2 88 °F 2005
3 87 °F 2015
4 85 °F 1958
5 84 °F 2008
5 84 °F 1991
5 84 °F 1984
8 83 °F 1948
9 81 °F 2001
9 81 °F 1979
9 81 °F 1967
All-Time Lowest Temperatures in Rapid City on September 21
Rank Temperature Year
1 23 °F 1995
2 25 °F 1983
3 29 °F 1954
4 30 °F 1972
5 32 °F 1975
5 32 °F 1953
7 34 °F 1951
8 35 °F 1971
8 35 °F 1978
10 36 °F 1982
10 36 °F 2002
10 36 °F 1974
Lowest High Temperatures in Rapid City on September 21
Rank Temperature Year
1 43 °F 1995
2 49 °F 1971
3 50 °F 2004
4 51 °F 1998
5 53 °F 1951
6 54 °F 1961
7 57 °F 2002
7 57 °F 1983
9 58 °F 1957
9 58 °F 1997
All-Time Most Precipitation in Rapid City on September 21
Rank Precipitation Year
1 0.4 inches 1998
2 0.3 inches 1963
3 0.3 inches 1989
4 0.1 inches 2022
5 0.1 inches 1984
6 0.1 inches 2006
6 0.1 inches 1973
6 0.1 inches 2004
9 0.0 inches 1969
9 0.0 inches 2003
9 0.0 inches 1994
Weather Station Details
Years Station Coordinates
1948–2022 Rapid City Regional Airport location