Rapid City, SD: records

4 October 2026: The hottest day on record in Rapid City, SD: 112°F on Saturday 25 July 2026.

The record begins: 1942

All-time records

Hottest day: 112°F; 25 July 2026
Coldest night: -31°F; 2 February 1996
Wettest day: 3.78 in; 15 June 1963
Warmest night: 75°F; 8 July 1985, 28 July 1960
Coldest day: -18°F; 2 February 1989

Daily records by decade

New daily records set in Rapid City, SD by decade since the 1970s: the most record highs, 105, came in the 1980s; the most record lows, 95, in the 1970s.

Record highs
Record lows

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1940s	0	0	8
1950s	0	0	10
1960s	0	0	10
1970s	69	95	10
1980s	105	94	10
1990s	75	65	10
2000s	86	48	10
2010s	49	39	10
2020s	53	34	7

Records by month

Month	Highest	Lowest	Wettest day
January	76°F 12 January 1987	-27°F 4 January 1950, 18 January 1943	1.26 in 27 January 1944
February	75°F 24 February 1995, 27 February 1988	-31°F 2 February 1996	0.87 in 9 February 1953
March	87°F 21 March 2026	-21°F 8 March 1996	2.01 in 25 March 1945
April	93°F 22 April 1989	-1°F 3 April 2020	3.19 in 5 April 1997
May	98°F 27 May 1969	18°F 1 May 1950	3.21 in 14 May 1965
June	109°F 26 June 2012, 29 June 2002	31°F 2 June 1951, 1 June 1951	3.78 in 15 June 1963
July	112°F 25 July 2026	39°F 13 July 1987, 1 July 1959	2.50 in 29 July 1944
August	107°F 29 August 2012, 13 August 2007	37°F 31 August 2020	2.60 in 4 August 1982
September	104°F 5 September 2020, 6 September 1978, 4 September 1960 and 1 more	18°F 24 September 1985, 26 September 1942	2.13 in 13 September 1966
October	96°F 3 October 2025, 2 October 2011	-7°F 26 October 2020	2.49 in 9 October 1982
November	83°F 8 November 1999, 7 November 1999	-19°F 14 November 1959	1.02 in 7 November 1944
December	75°F 2 December 2021, 4 December 1965	-30°F 30 December 1990	1.04 in 31 December 1975

Streaks, months and years

Longest heat streak	22 days	4 July to 25 July 1974	A high of 90°F or above
Longest cold streak	25 days	16 January to 9 February 1949	A high of 32°F or below
Wettest month	8.18 in	May 1996
Driest month	a trace	December 2001	and 1 more
Wettest year	28.43 in	2019
Driest year	9.12 in	1974

Every record in words

The coldest night on record in Rapid City, SD: a low of -31°F on Friday 2 February 1996.
The wettest day on record in Rapid City, SD: 3.78 in on Saturday 15 June 1963.
The warmest night on record in Rapid City, SD: a low of 75°F on Monday 8 July 1985 and Thursday 28 July 1960.
The coldest day on record in Rapid City, SD: a high of -18°F on Thursday 2 February 1989.
The longest run of days with a high of 90°F or above in Rapid City, SD: 22 days, from Thursday 4 July to Thursday 25 July 1974.
The longest run of days with a high of 32°F or below in Rapid City, SD: 25 days, from Sunday 16 January to Wednesday 9 February 1949.
The wettest month on record in Rapid City, SD: May 1996, with 8.18 in of precipitation.
The driest month on record in Rapid City, SD: December 2001, with a trace of precipitation (shared with 1 other month).
The wettest year on record in Rapid City, SD: 2019, with 28.43 in of precipitation.
The driest year on record in Rapid City, SD: 1974, with 9.12 in of precipitation.

Rapid City, SD the day's answers