Rapid City May 21 Weather Records

Daily averages and all-time records for weather in Rapid City, South Dakota for the date of May 21.

May 21 All-Time Records
1948–2024

92 °F

28 °F

40 °F

Highest daily low

62 °F

2.80 inches

Most snow

none

May 21 Average Weather
1991–2020 ¹

Average high

68.6 °F

Average low

43.8 °F

Chance precipitation

43.7%

Chance snow

0.8%

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	76	48	0.00	n/a
2022	48	28	0.02	n/a
2021	56	40	0.07	n/a
2020	76	46	0.01	n/a
2019	40	32	2.34	n/a
2018	74	38	0.00	0.0
2017	68	34	0.01	0.0
2016	67	52	0.01	0.0
2015	63	30	0.00	0.0
2014	63	47	0.08	0.0
2013	52	42	0.08	0.0
2012	86	47	0.00	0.0
2011	60	47	0.33	0.0
2010	66	49	0.30	0.0
2009	62	45	0.01	0.0
2008	67	45	0.00	0.0
2007	87	53	0.02	0.0
2006	75	46	0.00	0.0
2005	75	56	0.00	n/a
2004	75	48	0.69	n/a
2003	72	37	0.00	n/a
2002	80	50	0.03	n/a
2001	61	38	0.00	n/a
2000	75	43	0.00	0.0
1999	77	43	2.80	0.0
1998	62	47	0.90	n/a
1997	77	47	0.02	0.0
1996	73	37	0.00	n/a
1995	74	45	0.00	0.0
1994	76	47	0.00	0.0
1993	77	45	0.18	0.0
1992	75	45	0.67	0.0
1991	80	58	0.00	0.0
1990	72	47	0.00	0.0
1989	77	41	0.00	0.0
1988	70	45	0.00	0.0
1987	52	39	0.00	0.0
1986	79	50	0.00	0.0
1985	84	52	0.00	0.0
1984	59	47	0.23	0.0
1983	74	41	0.00	0.0
1982	59	47	0.00	0.0
1981	71	48	0.00	0.0
1980	86	53	0.00	0.0
1979	79	43	0.00	0.0
1978	76	44	0.10	0.0
1977	53	45	0.50	0.0
1976	60	50	0.12	0.0
1975	54	43	0.01	0.0
1974	67	33	0.00	0.0
1973	66	42	0.00	0.0
1972	83	53	0.44	0.0
1971	72	41	0.00	0.0
1970	67	51	0.00	0.0
1969	46	33	0.40	0.0
1968	70	34	0.00	0.0
1967	75	47	0.00	0.0
1966	92	45	0.00	0.0
1965	56	47	0.00	0.0
1964	91	58	0.00	0.0
1963	54	29	0.00	0.0
1962	57	47	1.86	0.0
1961	66	52	0.00	0.0
1960	84	41	0.00	0.0
1959	52	37	0.00	0.0
1958	88	54	0.08	0.0
1957	52	41	0.08	0.0
1956	84	54	0.00	0.0
1955	88	53	0.02	0.0
1954	92	62	0.00	0.0
1953	60	39	0.42	0.0
1952	68	49	0.48	0.0
1951	63	43	0.00	0.0
1950	79	44	0.00	0.0
1949	66	46	0.26	0.0
1948	77	56	0.00	0.0

What's the all-time high for Rapid City on 5/21?

For the date of May 21, the highest temperature ever reached in Rapid City history is 92 °F which has happened 2 times, most recently in 1966.

Highest Temperatures in Rapid City on May 21

What's the all-time low for Rapid City on 5/21?

For the date of May 21, the lowest temperature ever reached in Rapid City history is 28 °F which happened in 2022.

Lowest Temperatures in Rapid City on May 21

Lowest High Temperatures in Rapid City on May 21

What's the most it has ever rained in Rapid City on 5/21?

For the date of May 21, the most precipitation ever recorded in Rapid City history is 2.80 inches which happened in 1999.

All-Time Most Precipitation in Rapid City on May 21

Weather Station Details

Years	Station	Coordinates
1948–2024	Rapid City Regional Airport	location