Rapid City September 20 Weather Records

Daily averages and all-time records for weather in Rapid City, South Dakota for the date of September 20.

September 20 All-Time Records
1948–2024

93 °F

29 °F

45 °F

Highest daily low

58 °F

1.83 inches

Most snow

none

September 20 Average Weather
1991–2020 ¹

Average high

73.8 °F

Average low

44.5 °F

Chance precipitation

23.1%

Chance snow

0.6%

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	77	47	0.00	n/a
2022	77	53	0.00	n/a
2021	66	42	0.05	n/a
2020	80	49	0.00	n/a
2019	79	57	0.06	n/a
2018	62	46	0.36	0.0
2017	73	34	0.00	0.0
2016	83	53	0.00	0.0
2015	84	42	0.00	0.0
2014	78	50	0.00	0.0
2013	73	34	0.00	0.0
2012	78	43	0.00	0.0
2011	64	39	0.00	0.0
2010	86	47	0.00	0.0
2009	79	50	0.31	0.0
2008	85	44	0.00	0.0
2007	91	58	0.00	0.0
2006	69	35	0.00	0.0
2005	89	46	0.00	n/a
2004	62	47	0.06	n/a
2003	77	42	0.00	n/a
2002	71	42	0.00	n/a
2001	72	43	0.00	n/a
2000	61	43	0.00	0.0
1999	67	34	0.00	0.0
1998	54	46	0.30	0.0
1997	58	34	0.00	0.0
1996	59	44	0.01	0.0
1995	45	30	0.25	0.0
1994	83	53	0.00	0.0
1993	75	39	0.00	0.0
1992	87	54	0.00	0.0
1991	87	40	0.00	0.0
1990	64	45	0.00	0.0
1989	62	51	1.18	0.0
1988	68	32	0.00	0.0
1987	72	39	0.00	0.0
1986	56	50	0.05	0.0
1985	63	32	0.00	0.0
1984	78	47	0.00	0.0
1983	50	29	0.00	0.0
1982	65	35	0.00	0.0
1981	73	46	0.00	0.0
1980	75	51	0.00	0.0
1979	73	48	0.00	0.0
1978	59	36	0.00	0.0
1977	86	48	0.00	0.0
1976	75	38	0.00	0.0
1975	58	36	0.00	0.0
1974	64	41	0.00	0.0
1973	81	44	0.00	0.0
1972	70	41	0.00	0.0
1971	63	37	0.07	0.0
1970	82	45	0.00	0.0
1969	87	51	0.00	0.0
1968	78	47	0.00	0.0
1967	75	44	0.00	0.0
1966	83	50	0.00	0.0
1965	58	36	0.00	0.0
1964	73	38	0.00	0.0
1963	68	48	0.00	0.0
1962	75	46	0.00	0.0
1961	68	35	0.00	0.0
1960	93	51	0.00	0.0
1959	74	52	0.00	0.0
1958	70	41	0.00	0.0
1957	61	35	0.00	0.0
1956	91	45	0.00	0.0
1955	68	53	1.83	0.0
1954	63	39	0.00	0.0
1953	63	39	0.00	0.0
1952	69	47	0.00	0.0
1951	57	41	0.11	0.0
1950	58	50	1.36	0.0
1949	71	41	0.00	0.0
1948	67	47	0.05	0.0

What's the all-time high for Rapid City on 9/20?

For the date of Sep 20, the highest temperature ever reached in Rapid City history is 93 °F which happened in 1960.

Highest Temperatures in Rapid City on September 20

What's the all-time low for Rapid City on 9/20?

For the date of Sep 20, the lowest temperature ever reached in Rapid City history is 29 °F which happened in 1983.

Lowest Temperatures in Rapid City on September 20

Lowest High Temperatures in Rapid City on September 20

What's the most it has ever rained in Rapid City on 9/20?

For the date of Sep 20, the most precipitation ever recorded in Rapid City history is 1.83 inches which happened in 1955.

All-Time Most Precipitation in Rapid City on September 20

Weather Station Details

Years	Station	Coordinates
1948–2024	Rapid City Regional Airport	location