Rapid City April 20 Weather Records

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

April 20 All-Time Records 1948–2024
Highest temperature	89 °F	1962
Lowest temperature	2 °F	1966
Lowest daily high	31 °F	1951
Highest daily low	49 °F	1989
Most precipitation	0.71 inches	1964
Most snow	1.4 inches	1992

April 20 All-Time Records
1948–2024

Highest temperature

89 °F

2 °F

31 °F

Highest daily low

49 °F

0.71 inches

1.4 inches

April 20 Average Weather 1991–2020 ¹
Average high	58.5 °F
Average low	32.6 °F
Chance precipitation	35.6%
Chance snow	12.1%

April 20 Average Weather
1991–2020 ¹

Average high

58.5 °F

Average low

32.6 °F

Chance precipitation

35.6%

Chance snow

12.1%

Rapid City April 20 Weather by Year

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2024	48	19	0.00	n/a
2023	45	27	0.00	n/a
2022	63	32	0.07	n/a
2021	37	19	0.04	n/a
2020	66	29	0.00	n/a
2019	79	42	0.00	n/a
2018	57	33	0.01	0.0
2017	62	31	0.00	0.0
2016	62	35	0.00	0.0
2015	55	24	0.00	0.0
2014	74	36	0.00	0.0
2013	53	29	0.03	0.0
2012	63	30	0.00	0.0
2011	51	19	0.00	0.0
2010	61	41	0.00	0.0
2009	62	36	0.00	0.0
2008	60	32	0.00	0.0
2007	70	33	0.00	0.0
2006	49	32	0.10	0.0
2005	43	40	0.17	n/a
2004	65	36	0.00	n/a
2003	64	38	0.00	n/a
2002	40	29	0.14	n/a
2001	54	39	0.12	n/a
2000	42	23	0.00	0.0
1999	66	42	0.20	0.0
1998	58	29	0.00	n/a
1997	68	46	0.29	n/a
1996	60	31	0.00	n/a
1995	40	33	0.01	0.0
1994	75	44	0.00	0.0
1993	47	28	0.00	0.0
1992	35	29	0.07	1.4
1991	55	34	0.00	0.0
1990	76	42	0.00	0.0
1989	80	49	0.00	0.0
1988	70	35	0.01	0.0
1987	57	30	0.00	0.0
1986	55	39	0.00	0.0
1985	58	36	0.00	0.0
1984	57	32	0.00	0.0
1983	69	37	0.00	0.0
1982	47	28	0.00	0.0
1981	58	39	0.08	0.0
1980	87	46	0.00	0.0
1979	61	31	0.00	0.0
1978	47	30	0.00	0.0
1977	57	35	0.00	0.0
1976	60	31	0.00	0.0
1975	63	28	0.07	0.0
1974	60	43	0.01	0.0
1973	54	38	0.18	0.0
1972	51	32	0.00	0.0
1971	58	44	0.45	0.0
1970	35	26	0.00	0.0
1969	60	38	0.00	0.0
1968	58	37	0.00	0.0
1967	50	29	0.15	0.0
1966	33	2	0.00	0.0
1965	78	39	0.00	0.0
1964	46	35	0.71	0.0
1963	45	33	0.03	0.1
1962	89	44	0.01	0.0
1961	56	38	0.03	0.0
1960	71	39	0.00	0.0
1959	39	25	0.11	1.1
1958	61	36	0.00	0.0
1957	60	34	0.00	0.0
1956	77	35	0.00	0.0
1955	63	39	0.00	0.0
1954	51	29	0.08	0.0
1953	68	26	0.00	0.0
1952	70	42	0.00	0.0
1951	31	19	0.06	0.6
1950	56	24	0.00	0.0
1949	68	39	0.07	0.0

What's the all-time high for Rapid City on 4/20?

For the date of Apr 20, the highest temperature ever reached in Rapid City history is 89 °F which happened in 1962.

Highest Temperatures in Rapid City on April 20

Rank	Temperature	Year
1	89 °F	1962
2	87 °F	1980
3	80 °F	1989
4	79 °F	2019
5	78 °F	1965
6	77 °F	1956
7	76 °F	1990
8	75 °F	1994
9	74 °F	2014
10	71 °F	1960

What's the all-time low for Rapid City on 4/20?

For the date of Apr 20, the lowest temperature ever reached in Rapid City history is 2 °F which happened in 1966.

Lowest Temperatures in Rapid City on April 20

Rank	Temperature	Year
1	2 °F	1966
2	19 °F	2011
2	19 °F	2024
2	19 °F	2021
2	19 °F	1951
6	23 °F	2000
7	24 °F	1950
7	24 °F	2015
9	25 °F	1959
10	26 °F	1953
10	26 °F	1970

Lowest High Temperatures in Rapid City on April 20

Rank	Temperature	Year
1	31 °F	1951
2	33 °F	1966
3	35 °F	1970
3	35 °F	1992
5	37 °F	2021
6	39 °F	1959
7	40 °F	2002
7	40 °F	1995
9	42 °F	2000
10	43 °F	2005

What's the most it has ever rained in Rapid City on 4/20?

For the date of Apr 20, the most precipitation ever recorded in Rapid City history is 0.71 inches which happened in 1964.

All-Time Most Precipitation in Rapid City on April 20

Rank	Precipitation	Year
1	0.71 inches	1964
2	0.45 inches	1971
3	0.29 inches	1997
4	0.20 inches	1999
5	0.18 inches	1973
6	0.17 inches	2005
7	0.15 inches	1967
8	0.14 inches	2002
9	0.12 inches	2001
10	0.11 inches	1959

All-Time Most Snow in Rapid City on April 20

Rank	Precipitation	Year
1	1.4 inches	1992
2	1.1 inches	1959
3	0.6 inches	1951
4	0.1 inches	1963

Weather Station Details

Years	Station	Coordinates
1948–2024	Rapid City Regional Airport	location