Rapid City Rgnl AP Threshold Days by Year (USW00024090)

18 fixed thresholds counted per year at Rapid City Rgnl AP (USW00024090): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rapid City Rgnl AP Thresholds

Rapid City Rgnl AP: days with a maximum temperature at or above 30 C (86 F) in 78 years, most in 2012 with 80.
Rapid City Rgnl AP: days with a maximum temperature at or above 90 F (32.2 C) in 78 years, most in 1988 with 59.
Rapid City Rgnl AP: days with a maximum temperature at or below 0 C (32 F) in 78 years, most in 1978 with 79.
Rapid City Rgnl AP: nights with a minimum temperature at or below 0 C (32 F) in 78 years, most in 2019 with 196.
18 fixed thresholds have at least one qualifying day at Rapid City Rgnl AP.

Days at or above 30 C (86 F)

78 years with a qualifying day

Days per year at Rapid City Rgnl AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 80 in 2012.

Days at or above 30 C (86 F) per year at Rapid City Rgnl AP
Year	Days	Decade average
1949	54	54
1950	34	54
1951	31	54
1952	64	54
1953	55	54
1954	61	54
1955	72	54
1956	60	54
1957	45	54
1958	46	54
1959	72	54
1960	67	50.1
1961	70	50.1
1962	38	50.1
1963	67	50.1
1964	55	50.1
1965	32	50.1
1966	55	50.1
1967	43	50.1
1968	28	50.1
1969	46	50.1
1970	66	49.9
1971	48	49.9
1972	36	49.9
1973	44	49.9
1974	60	49.9
1975	51	49.9
1976	55	49.9
1977	44	49.9
1978	58	49.9
1979	37	49.9
1980	53	51.7
1981	38	51.7
1982	27	51.7
1983	61	51.7
1984	51	51.7
1985	51	51.7
1986	36	51.7
1987	56	51.7
1988	77	51.7
1989	67	51.7
1990	63	45
1991	47	45
1992	37	45
1993	21	45
1994	64	45
1995	47	45
1996	50	45
1997	30	45
1998	52	45
1999	39	45
2000	66	59.7
2001	61	59.7
2002	70	59.7
2003	70	59.7
2004	47	59.7
2005	62	59.7
2006	70	59.7
2007	77	59.7
2008	43	59.7
2009	31	59.7
2010	46	48.2
2011	51	48.2
2012	80	48.2
2013	54	48.2
2014	29	48.2
2015	50	48.2
2016	49	48.2
2017	67	48.2
2018	33	48.2
2019	23	48.2
2020	60	67.3
2021	79	67.3
2022	68	67.3
2023	46	67.3
2024	78	67.3
2025	64	67.3
2026	76	67.3

For each year, a bar from the first to the last day at Rapid City Rgnl AP meeting 30 C (86 F).

First to last qualifying date each year at Rapid City Rgnl AP
Year	First date	Last date
1949	1949-06-11	1949-10-05
1950	1950-06-05	1950-09-07
1951	1951-05-23	1951-09-30
1952	1952-04-26	1952-09-27
1953	1953-06-01	1953-10-11
1954	1954-05-20	1954-10-08
1955	1955-04-30	1955-10-10
1956	1956-06-02	1956-10-16
1957	1957-06-05	1957-10-02
1958	1958-04-16	1958-10-19
1959	1959-06-03	1959-09-14
1960	1960-04-10	1960-10-04
1961	1961-05-10	1961-10-16
1962	1962-04-20	1962-09-11
1963	1963-05-07	1963-10-09
1964	1964-05-16	1964-09-25
1965	1965-05-20	1965-10-15
1966	1966-05-04	1966-09-12
1967	1967-05-22	1967-10-03
1968	1968-06-02	1968-09-14
1969	1969-05-26	1969-09-28
1970	1970-05-17	1970-10-04
1971	1971-06-18	1971-09-13
1972	1972-05-16	1972-09-19
1973	1973-05-31	1973-09-07
1974	1974-06-03	1974-09-26
1975	1975-05-16	1975-10-07
1976	1976-05-14	1976-09-30
1977	1977-04-09	1977-09-20
1978	1978-05-15	1978-09-27
1979	1979-04-18	1979-09-30
1980	1980-04-20	1980-10-08
1981	1981-06-06	1981-10-02
1982	1982-07-03	1982-09-10
1983	1983-06-21	1983-09-27
1984	1984-05-15	1984-09-19
1985	1985-05-03	1985-09-17
1986	1986-05-04	1986-08-30
1987	1987-04-18	1987-10-03
1988	1988-04-30	1988-09-16
1989	1989-04-21	1989-09-30
1990	1990-06-18	1990-10-05
1991	1991-06-16	1991-10-16
1992	1992-04-30	1992-10-21
1993	1993-06-21	1993-10-06
1994	1994-05-10	1994-09-28
1995	1995-06-13	1995-10-16
1996	1996-04-10	1996-10-05
1997	1997-06-22	1997-10-02
1998	1998-05-30	1998-09-18
1999	1999-06-20	1999-10-11
2000	2000-05-05	2000-10-18
2001	2001-04-28	2001-10-01
2002	2002-05-30	2002-09-17
2003	2003-04-12	2003-10-09
2004	2004-05-05	2004-09-19
2005	2005-04-17	2005-10-01
2006	2006-05-18	2006-10-01
2007	2007-05-13	2007-10-01
2008	2008-06-24	2008-09-25
2009	2009-05-18	2009-09-15
2010	2010-05-28	2010-10-07
2011	2011-06-02	2011-10-04
2012	2012-04-01	2012-09-29
2013	2013-05-13	2013-09-30
2014	2014-05-28	2014-09-26
2015	2015-05-02	2015-10-18
2016	2016-06-02	2016-09-11
2017	2017-05-06	2017-10-19
2018	2018-05-26	2018-10-02
2019	2019-06-07	2019-09-17
2020	2020-06-01	2020-10-08
2021	2021-04-30	2021-10-05
2022	2022-05-27	2022-09-29
2023	2023-04-11	2023-09-18
2024	2024-04-13	2024-10-16
2025	2025-05-10	2025-10-03
2026	2026-03-19	2026-10-10

Every Fixed Threshold

Fixed thresholds at Rapid City Rgnl AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	78	80	2012	76
35 C (95 F): Days	77	36	1988	26
40 C (104 F): Days	38	9	2007	4
90 F (32.2 C): Days	78	59	1988	57
100 F (37.8 C): Days	66	16	1988	14
110 F (43.3 C): Days	4	1	1973	1
0 C (32 F): Ice days (max	78	79	1978	11
0 C (32 F): Frost days (min	78	196	2019	102
-10 C (14 F): Days with min	78	95	1978	23
-20 C (-4 F): Days with min	78	32	1996	4
-30 C (-22 F): Days with min	23	6	1989	1
20 C (68 F): Tropical nights (min	54	12	2007	10
10 mm (0.39 in): Days with 10 mm or more rain	78	21	1982	6
25 mm (0.98 in): Days with 25 mm or more rain	69	9	2015	3
50 mm (1.97 in): Days with 50 mm or more rain	17	2	1980	1
10 cm (3.9 in): Days with 10 cm or more snowfall	48	8	2013	6
25 cm (9.8 in): Days with 25 cm or more snowfall	11	2	2009	2
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	2013	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

Data for Rapid City Rgnl AP threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Rapid City Rgnl AP Threshold Days by Year (USW00024090)

Key Facts for Rapid City Rgnl AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related