Rapid City April 21 Weather Records

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

April 21 All-Time Records 1948–2024
Highest temperature	92 °F	1980
Lowest temperature	14 °F	1959
Lowest daily high	33 °F	1951
Highest daily low	50 °F	1989
Most precipitation	0.88 inches	2005
Most snow	2.1 inches	1968

April 21 All-Time Records
1948–2024

Highest temperature

92 °F

14 °F

33 °F

Highest daily low

50 °F

0.88 inches

2.1 inches

April 21 Average Weather 1991–2020 ¹
Average high	58.9 °F
Average low	32.9 °F
Chance precipitation	35.2%
Chance snow	11.4%

April 21 Average Weather
1991–2020 ¹

Average high

58.9 °F

Average low

32.9 °F

Chance precipitation

35.2%

Chance snow

11.4%

Rapid City April 21 Weather by Year

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2024	69	24	0.00	n/a
2023	40	24	0.00	n/a
2022	72	20	0.00	n/a
2021	46	18	0.00	n/a
2020	75	30	0.00	n/a
2019	53	41	0.15	n/a
2018	55	36	0.00	0.0
2017	60	34	0.00	0.0
2016	67	40	0.00	0.0
2015	56	25	0.00	0.0
2014	68	34	0.00	0.0
2013	49	31	0.26	0.6
2012	65	35	0.00	0.0
2011	65	40	0.22	0.0
2010	63	35	0.00	0.0
2009	74	36	0.00	0.0
2008	47	22	0.00	0.0
2007	65	45	0.25	0.0
2006	63	29	0.00	0.0
2005	46	37	0.88	n/a
2004	61	36	0.17	n/a
2003	67	34	0.00	n/a
2002	45	28	0.03	n/a
2001	42	32	0.42	n/a
2000	56	29	0.00	0.0
1999	47	40	0.29	0.0
1998	64	32	0.00	n/a
1997	58	41	0.05	n/a
1996	49	28	0.02	n/a
1995	51	32	0.01	0.0
1994	67	36	0.00	0.0
1993	66	24	0.00	0.0
1992	51	27	0.00	0.0
1991	61	31	0.00	0.0
1990	82	46	0.00	0.0
1989	88	50	0.00	0.0
1988	37	29	0.01	0.0
1987	61	29	0.00	0.0
1986	61	32	0.00	0.0
1985	63	37	0.00	0.0
1984	57	33	0.00	0.0
1983	55	36	0.00	0.0
1982	56	28	0.00	0.0
1981	68	41	0.16	0.0
1980	92	46	0.00	0.0
1979	66	31	0.00	0.0
1978	57	29	0.00	0.0
1977	68	34	0.00	0.0
1976	56	32	0.00	0.0
1975	60	33	0.00	0.0
1974	54	35	0.00	0.0
1973	51	30	0.00	0.0
1972	64	27	0.00	0.0
1971	55	43	0.15	0.0
1970	41	20	0.00	0.0
1969	67	35	0.00	0.0
1968	50	33	0.40	2.1
1967	37	23	0.00	0.0
1966	46	18	0.00	0.0
1965	76	40	0.00	0.0
1964	60	37	0.03	0.0
1963	34	27	0.14	1.4
1962	58	40	0.00	0.0
1961	60	36	0.00	0.0
1960	71	42	0.00	0.0
1959	42	14	0.00	0.0
1958	51	37	0.11	0.0
1957	70	37	0.00	0.0
1956	59	34	0.00	0.0
1955	69	36	0.00	0.0
1954	48	27	0.00	0.0
1953	75	45	0.00	0.0
1952	56	40	0.00	0.0
1951	33	18	0.02	0.2
1950	70	33	0.00	0.0
1949	60	38	0.00	0.0

What's the all-time high for Rapid City on 4/21?

For the date of Apr 21, the highest temperature ever reached in Rapid City history is 92 °F which happened in 1980.

Highest Temperatures in Rapid City on April 21

Rank	Temperature	Year
1	92 °F	1980
2	88 °F	1989
3	82 °F	1990
4	76 °F	1965
5	75 °F	1953
5	75 °F	2020
7	74 °F	2009
8	72 °F	2022
9	71 °F	1960
10	70 °F	1957
10	70 °F	1950

What's the all-time low for Rapid City on 4/21?

For the date of Apr 21, the lowest temperature ever reached in Rapid City history is 14 °F which happened in 1959.

Lowest Temperatures in Rapid City on April 21

Rank	Temperature	Year
1	14 °F	1959
2	18 °F	1966
2	18 °F	1951
2	18 °F	2021
5	20 °F	1970
5	20 °F	2022
7	22 °F	2008
8	23 °F	1967
9	24 °F	1993
9	24 °F	2023
9	24 °F	2024

Lowest High Temperatures in Rapid City on April 21

Rank	Temperature	Year
1	33 °F	1951
2	34 °F	1963
3	37 °F	1967
3	37 °F	1988
5	40 °F	2023
6	41 °F	1970
7	42 °F	1959
7	42 °F	2001
9	45 °F	2002
10	46 °F	2021
10	46 °F	1966
10	46 °F	2005

What's the most it has ever rained in Rapid City on 4/21?

For the date of Apr 21, the most precipitation ever recorded in Rapid City history is 0.88 inches which happened in 2005.

All-Time Most Precipitation in Rapid City on April 21

Rank	Precipitation	Year
1	0.88 inches	2005
2	0.42 inches	2001
3	0.40 inches	1968
4	0.29 inches	1999
5	0.26 inches	2013
6	0.25 inches	2007
7	0.22 inches	2011
8	0.17 inches	2004
9	0.16 inches	1981
10	0.15 inches	2019
10	0.15 inches	1971

All-Time Most Snow in Rapid City on April 21

Rank	Precipitation	Year
1	2.1 inches	1968
2	1.4 inches	1963
3	0.6 inches	2013
4	0.2 inches	1951

Weather Station Details

Years	Station	Coordinates
1948–2024	Rapid City Regional Airport	location