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
1948–2024

92 °F

23 °F

43 °F

Highest daily low

53 °F

0.45 inches

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%

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	82	50	0.00	n/a
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

What's the all-time high for Rapid City on 9/21?

For the date of Sep 21, the highest temperature ever reached in Rapid City history is 92 °F which happened in 2013.

Highest Temperatures in Rapid City on September 21

What's the all-time low for Rapid City on 9/21?

For the date of Sep 21, the lowest temperature ever reached in Rapid City history is 23 °F which happened in 1995.

Lowest Temperatures in Rapid City on September 21

Lowest High Temperatures in Rapid City on September 21

What's the most it has ever rained in Rapid City on 9/21?

For the date of Sep 21, the most precipitation ever recorded in Rapid City history is 0.45 inches which happened in 1998.

All-Time Most Precipitation in Rapid City on September 21

Weather Station Details

Years	Station	Coordinates
1948–2024	Rapid City Regional Airport	location