Rapid City, SD: August

31 August 2026: August 2026 averaged 73.1°F in Rapid City, SD, the warmest August since 2024, tied 26th warmest of 85 (with 2011 and 1989).

August 2026

Mean temperature: 73.1°F; Warmest since 2024; 26th warmest of 85
Precipitation: 2.17 in; Wettest since 2025; 23rd wettest of 85

A normal August in Rapid City, SD (1991 to 2020): a mean temperature of 71.8°F, between 67.8°F and 74.2°F in eight years of ten and 1.42 in of precipitation, between 0.47 in and 2.93 in in eight years of ten.

The mean temperature of every August in Rapid City, SD since 1942: 73.1°F in 2026; the highest is 78°F, in 1983.

Normal range, 67.8 to 74.2°F

Every year, ranked, as a table

Every August in Rapid City, SD from 1942 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank
2026	73.1	26	88.5	28	57.6	35	2.17	23
2025	72.5	32	86.5	39	58.4	20	2.96	9
2024	73.7	19	89	23	58.4	20	0.97	58
2023	71.3	46	86.5	39	56.1	54	0.87	63
2022	74.2	11	90.3	7	58.1	26	2.76	13
2021	71.5	43	88.1	31	55	65	2.14	24
2020	72.2	41	89.2	19	55.3	61	0.94	60
2019	67.8	76	79.8	83	55.7	58	2.88	11
2018	67.5	79	82.1	71	53	79	1.06	54
2017	68.7	69	83.7	61	53.7	75	2.07	26
2016	69.5	62	83.9	59	55	65	2.28	22
2015	69.8	58	84.5	55	55.2	62	3.41	5
2014	69.3	66	81.4	77	57.1	41	4.02	3
2013	72.6	30	86.1	46	59.2	10	2.41	17
2012	72.4	37	89.1	21	55.7	58	0.58	71
2011	73.1	26	88.1	31	58.1	26	1.75	35
2010	72.5	32	87.9	33	57.1	41	1.33	46
2009	67.5	79	82.7	68	52.4	83	1.48	40
2008	70.9	49	85.9	48	55.8	56	1.42	42
2007	74.2	11	87.4	34	60.9	4	2.82	12
2006	73	29	88.2	30	57.9	31	1.76	34
2005	70.8	51	86	47	55.6	60	1.80	32
2004	68	75	83.2	63	52.8	80	0.80	65
2003	75.9	4	91.5	3	60.3	5	0.47	74
2002	71.1	47	87.3	35	55	65	0.76	66
2001	74.4	9	90.3	7	58.5	18	1.59	39
2000	74.4	9	90.3	7	58.5	18	0.70	68
1999	71.4	45	86.2	45	56.6	50	0.47	74
1998	72.3	40	86.5	39	58.1	26	1.42	42
1997	68.7	69	80.6	78	56.8	45	3.93	4
1996	73.2	25	89.3	17	57	43	1.85	31
1995	73.6	23	89.3	17	57.8	32	0.46	77
1994	73.3	24	88.9	24	57.7	34	0.92	62
1993	68.6	71	81.9	73	55.2	62	1.18	51
1992	65.8	85	80.6	78	51.1	85	0.47	74
1991	74	16	88.8	25	59.2	10	0.58	71
1990	73.7	19	89.1	21	58.4	20	1.87	28
1989	73.1	26	88.7	26	57.4	40	1.70	37
1988	72.5	32	88.5	28	56.5	51	1.98	27
1987	68.1	74	81.7	76	54.5	73	2.37	20
1986	69.6	61	84.6	54	54.6	71	1.32	47
1985	69	68	83	65	55	65	1.86	30
1984	74.8	7	89.8	12	59.8	8	1.00	57
1983	78	1	91.7	2	64.2	1	2.39	18
1982	70.2	56	82.1	71	58.3	24	4.83	1
1981	70	57	83	65	57	43	1.74	36
1980	68.5	72	81.9	73	55.2	62	2.38	19
1979	68.5	72	80.5	82	56.4	52	2.32	21
1978	69.7	60	84.7	53	54.6	71	1.42	42
1977	66	83	79.6	84	52.3	84	1.79	33
1976	72.6	30	87.2	37	58	29	1.31	49
1975	70.3	55	85.8	49	54.8	70	0.87	63
1974	67.6	78	82.8	67	52.5	82	1.37	45
1973	74.2	11	89.6	15	58.9	13	0.74	67
1972	69.1	67	83.2	63	55	65	2.49	15
1971	73.8	17	89.9	11	57.8	32	0.52	73
1970	73.8	17	90.1	10	57.5	37	0.67	70
1969	73.7	19	89.5	16	58	29	0.31	82
1968	67	81	80.6	78	53.3	77	2.46	16
1967	70.6	53	85.4	51	55.8	56	0.95	59
1966	65.9	84	79.1	85	52.7	81	3.24	6
1965	70.7	52	83.8	60	57.5	37	1.46	41
1964	69.4	65	84.5	55	54.4	74	1.87	28
1963	73.7	19	88.6	27	58.9	13	1.32	47
1962	71.1	47	86.3	44	56	55	1.03	55
1961	77.2	2	92	1	62.4	2	0.43	80
1960	72.4	37	87.3	35	57.5	37	1.24	50
1959	75.7	5	91.3	4	60	7	0.36	81
1958	74.7	8	89.2	19	60.2	6	0.26	83
1957	71.6	42	84.1	57	59.1	12	1.03	55
1956	69.5	62	82.2	70	56.7	46	3.15	7
1955	76.1	3	90.5	6	61.8	3	1.65	38
1954	72.5	32	86.6	38	58.4	20	2.11	25
1953	72.5	32	86.4	43	58.6	16	0.94	60
1952	72.4	37	86.5	39	58.3	24	0.70	68
1951	69.5	62	82.3	69	56.7	46	2.92	10
1950	67.7	77	81.8	75	53.5	76	2.74	14
1949	74.1	15	89.7	13	58.6	16	1.16	53
1948	71.5	43	85.5	50	57.6	35	3.06	8
1947	75.3	6	91.1	5	59.5	9	0.46	77
1946	67	81	80.6	78	53.3	77	1.18	51
1945	70.9	49	85.1	52	56.7	46	4.40	2
1944	69.8	58	83.5	62	56.2	53	0.45	79
1943	74.2	11	89.7	13	58.8	15	0.10	85
1942	70.4	54	84.1	57	56.7	46	0.24	84

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1983	78
1961	77.2
1955	76.1
2003	75.9
1959	75.7
1947	75.3
1984	74.8
1958	74.7
2001	74.4
2000	74.4

Coldest
Year	Mean, °F
1992	65.8
1966	65.9
1977	66
1968	67
1946	67
2018	67.5
2009	67.5
1974	67.6
1950	67.7
2019	67.8

Wettest
Year	Precipitation, in
1982	4.83
1945	4.40
2014	4.02
1997	3.93
2015	3.41
1966	3.24
1956	3.15
1948	3.06
2025	2.96
1951	2.92

Driest
Year	Precipitation, in
1943	0.10
1942	0.24
1958	0.26
1969	0.31
1959	0.36
1961	0.43
1944	0.45
1995	0.46
1947	0.46
2003	0.47
More years share the last value

The hottest, coldest and wettest days

Hottest day: 104°F; 2 August 2026
Coldest night: 43°F; 4 August 2026
Wettest day: 1.14 in; 16 August 2026

Every month, season and year

Months

Seasons

Years

Rapid City, SD the day's answers

All-time records

Every answer in words

August 2026 brought 2.17 in of precipitation in Rapid City, SD, the wettest August since 2025, 23rd wettest of 85.
The hottest day of August 2026 in Rapid City, SD: 104°F on Sunday 2 August 2026.
The coldest night of August 2026 in Rapid City, SD: a low of 43°F on Tuesday 4 August 2026.
The wettest day of August 2026 in Rapid City, SD: 1.14 in on Sunday 16 August 2026.