Rapid City August 20 Weather Records

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

August 20 All-Time Records
1948–2024

104 °F

42 °F

62 °F

Highest daily low

66 °F

0.53 inches

Most snow

none

August 20 Average Weather
1991–2020 ¹

Average high

85.8 °F

Average low

55.8 °F

Chance precipitation

24.8%

Chance snow

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	71	55	0.00	n/a
2022	85	50	0.00	n/a
2021	73	51	0.19	n/a
2020	97	60	0.00	n/a
2019	81	63	0.00	n/a
2018	68	43	0.02	0.0
2017	82	56	0.00	0.0
2016	73	42	0.00	0.0
2015	83	45	0.00	0.0
2014	89	63	0.00	0.0
2013	95	59	0.00	0.0
2012	86	48	0.00	0.0
2011	83	53	0.00	0.0
2010	93	55	0.00	0.0
2009	73	48	0.00	0.0
2008	94	62	0.00	0.0
2007	83	57	0.00	0.0
2006	91	59	0.01	0.0
2005	87	53	0.00	n/a
2004	78	53	0.00	n/a
2003	97	60	0.00	n/a
2002	88	64	0.00	n/a
2001	92	57	0.00	0.0
2000	94	59	0.00	0.0
1999	91	57	0.00	0.0
1998	87	63	0.21	n/a
1997	80	52	0.00	0.0
1996	96	56	0.00	n/a
1995	92	49	0.00	0.0
1994	85	52	0.00	0.0
1993	77	61	0.23	0.0
1992	97	57	0.00	0.0
1991	95	66	0.00	0.0
1990	84	56	0.00	0.0
1989	84	52	0.00	0.0
1988	97	60	0.00	0.0
1987	87	57	0.00	0.0
1986	74	50	0.00	0.0
1985	81	56	0.00	0.0
1984	77	55	0.21	0.0
1983	94	59	0.04	0.0
1982	81	62	0.00	0.0
1981	95	62	0.00	0.0
1980	73	54	0.21	0.0
1979	71	54	0.00	0.0
1978	92	47	0.00	0.0
1977	86	54	0.03	0.0
1976	100	61	0.00	0.0
1975	86	57	0.00	0.0
1974	79	56	0.00	0.0
1973	104	60	0.00	0.0
1972	88	60	0.00	0.0
1971	93	56	0.00	0.0
1970	89	51	0.00	0.0
1969	94	57	0.00	0.0
1968	88	54	0.00	0.0
1967	91	53	0.00	0.0
1966	62	51	0.18	0.0
1965	65	57	0.53	0.0
1964	72	42	0.00	0.0
1963	98	64	0.01	0.0
1962	92	58	0.00	0.0
1961	95	64	0.00	0.0
1960	95	54	0.00	0.0
1959	88	59	0.00	0.0
1958	78	55	0.06	0.0
1957	87	61	0.00	0.0
1956	72	51	0.00	0.0
1955	97	62	0.00	0.0
1954	91	55	0.12	0.0
1953	92	60	0.00	0.0
1952	85	62	0.01	0.0
1951	72	52	0.00	0.0
1950	76	45	0.00	0.0
1949	85	57	0.11	0.0
1948	80	58	0.00	0.0

What's the all-time high for Rapid City on 8/20?

For the date of Aug 20, the highest temperature ever reached in Rapid City history is 104 °F which happened in 1973.

Highest Temperatures in Rapid City on August 20

What's the all-time low for Rapid City on 8/20?

For the date of Aug 20, the lowest temperature ever reached in Rapid City history is 42 °F which has happened 2 times, most recently in 2016.

Lowest Temperatures in Rapid City on August 20

Lowest High Temperatures in Rapid City on August 20

What's the most it has ever rained in Rapid City on 8/20?

For the date of Aug 20, the most precipitation ever recorded in Rapid City history is 0.53 inches which happened in 1965.

All-Time Most Precipitation in Rapid City on August 20

Weather Station Details

Years	Station	Coordinates
1948–2024	Rapid City Regional Airport	location