Average September Temperature in Rapid City by Year

This page contains a list of the average monthly high and low temperatures in Rapid City, South Dakota for the month of September each year between 1948 and 2023. It is based on NOAA data.

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What Was the Hottest September Ever in Rapid City?

1952 was the warmest September in the history of Rapid City, South Dakota. The average daily high temperature was 82.6 °F, and the average low was 51.7 °F.

What Was the Coldest September Ever in Rapid City?

1965 was the coolest September in the history of Rapid City, South Dakota. The average daily high temperature was 60.6 °F, and the average low was 38.8 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	15	79.8	49.1
2022	10	81.7	49.1
2021	12	81.2	48.9
2020	51	76.2	43.6
2019	34	75.3	48.3
2018	47	72.1	48.2
2017	41	75.6	46.7
2016	36	75.9	47.1
2015	13	80.3	49.3
2014	49	74.7	45.3
2013	8	80.9	50.7
2012	16	81.8	45.9
2011	39	77.1	45.2
2010	50	76.1	43.9
2009	27	77.6	47.5
2008	59	74.6	43.4
2007	18	78.7	48.6
2006	65	71.1	44.5
2005	11	81.9	48.7
2004	31	75.8	49.2
2003	55	75.0	44.1
2002	33	75.8	48.0
2001	29	77.6	47.4
2000	22	79.9	46.8
1999	73	70.8	40.5
1998	2	82.1	52.0
1997	30	77.0	48.0
1996	53	72.1	47.4
1995	48	75.1	45.0
1994	9	80.5	50.4
1993	70	70.4	42.8
1992	28	79.4	45.7
1991	40	76.7	45.5
1990	7	80.8	51.0
1989	42	75.7	46.3
1988	45	75.3	45.4
1987	37	77.8	44.9
1986	75	64.7	45.2
1985	72	68.5	43.2
1984	68	71.0	43.3
1983	44	75.7	45.8
1982	63	71.0	46.3
1981	20	78.7	48.4
1980	35	76.9	46.3
1979	5	82.9	49.6
1978	6	82.4	50.0
1977	43	74.9	47.0
1976	23	79.3	47.2
1975	64	74.0	43.0
1974	66	72.8	42.3
1973	69	69.4	44.8
1972	56	76.0	42.7
1971	67	71.3	43.5
1970	58	74.0	44.1
1969	14	81.2	48.3
1968	52	74.9	44.6
1967	21	76.9	49.8
1966	38	74.6	47.9
1965	76	60.6	38.8
1964	60	73.7	44.3
1963	4	79.8	53.1
1962	46	74.8	45.7
1961	74	69.0	42.2
1960	19	77.8	49.4
1959	62	71.9	45.7
1958	17	79.3	48.3
1957	57	73.1	45.2
1956	26	78.0	47.9
1955	32	75.7	48.6
1954	24	76.9	49.4
1953	25	79.1	47.2
1952	1	82.6	51.7
1951	71	68.6	43.1
1950	61	70.8	47.2
1949	54	74.4	45.0
1948	3	81.3	52.2

Weather Station Details

Years	Station	Coordinates
1948–2024	Rapid City Regional Airport	location