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Highest September Temperatures in Rapid City

A list of the highest temperatures ever recorded in the month of September in Rapid City, South Dakota from 1948–2022.
What's the hottest it has ever gotten in Rapid City in September?
The hottest September temperature in Rapid City, South Dakota history was 104 °F which has occurred 4 times, most recently on September 5, 2020.
Rank Temperature Date
1 104 °F September 5, 2020
1 104 °F September 6, 1978
1 104 °F September 4, 1960
1 104 °F September 2, 1960
5 103 °F September 4, 2001
5 103 °F September 8, 1959
5 103 °F September 15, 1948
8 102 °F September 9, 1994
8 102 °F September 9, 1979
10 101 °F September 1, 2012
10 101 °F September 17, 2000
10 101 °F September 5, 1978
10 101 °F September 2, 1971
14 100 °F September 10, 2012
14 100 °F September 3, 2005
14 100 °F September 5, 2002
14 100 °F September 5, 2000
14 100 °F September 9, 1998
14 100 °F September 4, 1998
14 100 °F September 4, 1978
14 100 °F September 6, 1976
14 100 °F September 14, 1948
14 100 °F September 3, 1948