Sioux Falls Threshold Days by Year (USW00014944)

19 fixed thresholds counted per year at Sioux Falls (USW00014944): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sioux Falls Thresholds

Sioux Falls: days with a maximum temperature at or above 30 C (86 F) in 95 years, most in 1936 with 78.
Sioux Falls: days with a maximum temperature at or above 90 F (32.2 C) in 95 years, most in 1936 with 61.
Sioux Falls: days with a maximum temperature at or below 0 C (32 F) in 95 years, most in 1978 with 101.
Sioux Falls: nights with a minimum temperature at or below 0 C (32 F) in 95 years, most in 1997 with 186.
19 fixed thresholds have at least one qualifying day at Sioux Falls.

Days at or above 30 C (86 F)

95 years with a qualifying day

Days per year at Sioux Falls with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 78 in 1936.

Days at or above 30 C (86 F) per year at Sioux Falls
Year	Days	Decade average
1932	31	56
1933	54	56
1934	50	56
1935	60	56
1936	78	56
1937	58	56
1938	58	56
1939	59	56
1940	45	39.6
1941	61	39.6
1942	33	39.6
1943	30	39.6
1944	16	39.6
1945	22	39.6
1946	31	39.6
1947	50	39.6
1948	53	39.6
1949	55	39.6
1950	29	46.9
1951	23	46.9
1952	55	46.9
1953	46	46.9
1954	44	46.9
1955	68	46.9
1956	55	46.9
1957	43	46.9
1958	49	46.9
1959	57	46.9
1960	41	43
1961	50	43
1962	29	43
1963	58	43
1964	56	43
1965	25	43
1966	46	43
1967	41	43
1968	45	43
1969	39	43
1970	56	48
1971	42	48
1972	35	48
1973	54	48
1974	50	48
1975	52	48
1976	78	48
1977	41	48
1978	39	48
1979	33	48
1980	54	45.1
1981	49	45.1
1982	25	45.1
1983	60	45.1
1984	32	45.1
1985	28	45.1
1986	28	45.1
1987	57	45.1
1988	74	45.1
1989	44	45.1
1990	51	34
1991	52	34
1992	12	34
1993	17	34
1994	44	34
1995	51	34
1996	25	34
1997	23	34
1998	30	34
1999	35	34
2000	30	36.7
2001	47	36.7
2002	46	36.7
2003	36	36.7
2004	23	36.7
2005	41	36.7
2006	45	36.7
2007	48	36.7
2008	32	36.7
2009	19	36.7
2010	32	36.2
2011	37	36.2
2012	71	36.2
2013	33	36.2
2014	14	36.2
2015	26	36.2
2016	40	36.2
2017	38	36.2
2018	38	36.2
2019	33	36.2
2020	70	59.9
2021	65	59.9
2022	60	59.9
2023	73	59.9
2024	40	59.9
2025	52	59.9
2026	59	59.9

For each year, a bar from the first to the last day at Sioux Falls meeting 30 C (86 F).

First to last qualifying date each year at Sioux Falls
Year	First date	Last date
1932	1932-05-13	1932-08-24
1933	1933-05-18	1933-09-18
1934	1934-04-30	1934-08-18
1935	1935-06-12	1935-09-24
1936	1936-05-05	1936-09-22
1937	1937-05-29	1937-10-29
1938	1938-06-03	1938-10-03
1939	1939-04-23	1939-09-22
1940	1940-05-12	1940-09-19
1941	1941-05-14	1941-09-20
1942	1942-05-28	1942-08-31
1943	1943-03-30	1943-08-12
1944	1944-06-01	1944-08-13
1945	1945-06-22	1945-09-07
1946	1946-06-06	1946-08-20
1947	1947-06-26	1947-10-05
1948	1948-05-19	1948-09-19
1949	1949-04-25	1949-09-03
1950	1950-05-23	1950-10-30
1951	1951-06-16	1951-10-01
1952	1952-05-03	1952-09-30
1953	1953-05-29	1953-10-02
1954	1954-04-14	1954-09-01
1955	1955-05-01	1955-09-18
1956	1956-05-12	1956-10-12
1957	1957-05-07	1957-08-31
1958	1958-05-10	1958-10-15
1959	1959-05-01	1959-09-08
1960	1960-04-22	1960-09-07
1961	1961-05-31	1961-09-10
1962	1962-04-24	1962-08-27
1963	1963-04-01	1963-10-06
1964	1964-04-16	1964-09-09
1965	1965-04-29	1965-08-25
1966	1966-05-26	1966-08-31
1967	1967-05-22	1967-10-02
1968	1968-03-30	1968-09-14
1969	1969-05-26	1969-09-14
1970	1970-05-07	1970-09-29
1971	1971-06-03	1971-09-13
1972	1972-05-17	1972-09-19
1973	1973-05-21	1973-09-10
1974	1974-05-20	1974-10-10
1975	1975-05-17	1975-10-13
1976	1976-05-19	1976-10-03
1977	1977-04-09	1977-09-08
1978	1978-05-25	1978-09-11
1979	1979-05-28	1979-09-17
1980	1980-04-19	1980-10-09
1981	1981-04-25	1981-09-20
1982	1982-06-23	1982-08-19
1983	1983-05-27	1983-09-28
1984	1984-06-26	1984-09-19
1985	1985-04-11	1985-09-07
1986	1986-06-15	1986-08-25
1987	1987-04-19	1987-10-04
1988	1988-04-07	1988-09-17
1989	1989-05-23	1989-08-31
1990	1990-04-22	1990-10-05
1991	1991-04-05	1991-09-14
1992	1992-04-30	1992-10-02
1993	1993-06-11	1993-10-06
1994	1994-04-18	1994-09-19
1995	1995-06-06	1995-09-15
1996	1996-05-17	1996-09-04
1997	1997-06-19	1997-10-02
1998	1998-05-18	1998-09-19
1999	1999-06-05	1999-09-25
2000	2000-05-05	2000-09-30
2001	2001-04-28	2001-10-02
2002	2002-04-15	2002-09-09
2003	2003-06-15	2003-09-07
2004	2004-04-18	2004-09-19
2005	2005-06-06	2005-10-03
2006	2006-04-13	2006-10-07
2007	2007-04-29	2007-10-06
2008	2008-06-19	2008-09-26
2009	2009-04-23	2009-08-14
2010	2010-05-22	2010-09-20
2011	2011-05-30	2011-10-04
2012	2012-04-01	2012-09-11
2013	2013-05-13	2013-09-18
2014	2014-05-27	2014-09-19
2015	2015-06-09	2015-10-11
2016	2016-05-06	2016-09-23
2017	2017-06-02	2017-09-22
2018	2018-05-23	2018-10-03
2019	2019-06-04	2019-09-30
2020	2020-05-01	2020-10-06
2021	2021-04-05	2021-09-28
2022	2022-05-12	2022-09-20
2023	2023-04-11	2023-10-02
2024	2024-04-13	2024-09-29
2025	2025-05-09	2025-10-04
2026	2026-03-21	2026-10-10

Every Fixed Threshold

Fixed thresholds at Sioux Falls
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	95	78	1936	59
35 C (95 F): Days	82	37	1936	7
40 C (104 F): Days	19	8	1936	1
90 F (32.2 C): Days	95	61	1936	28
100 F (37.8 C): Days	47	21	1936	4
110 F (43.3 C): Days	2	1	1936	1
0 C (32 F): Ice days (max	95	101	1978	32
0 C (32 F): Frost days (min	95	186	1997	97
-10 C (14 F): Days with min	95	96	1955	32
-20 C (-4 F): Days with min	95	47	1978	10
-30 C (-22 F): Days with min	50	8	1936	1
20 C (68 F): Tropical nights (min	95	41	1936	26
25 C (77 F): Days with min	35	8	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	95	33	2019	18
25 mm (0.98 in): Days with 25 mm or more rain	94	11	2010	4
50 mm (1.97 in): Days with 50 mm or more rain	56	4	2014	3
100 mm (3.94 in): Days with 100 mm or more rain	9	1	1936	1
10 cm (3.9 in): Days with 10 cm or more snowfall	87	7	1969	1
25 cm (9.8 in): Days with 25 cm or more snowfall	17	2	1945	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

Download the Data

Data for Sioux Falls 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).

Sioux Falls Threshold Days by Year (USW00014944)

Key Facts for Sioux Falls Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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