Flandreau Threshold Days by Year (USC00392984)

20 fixed thresholds counted per year at Flandreau (USC00392984): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Flandreau Thresholds

Flandreau: days with a maximum temperature at or above 30 C (86 F) in 127 years, most in 1894 with 86.
Flandreau: days with a maximum temperature at or below 0 C (32 F) in 127 years, most in 2013 with 114.
Flandreau: days with a maximum temperature at or above 90 F (32.2 C) in 126 years, most in 1894 with 64.
Flandreau: days with 10 mm (0.39 in) or more of precipitation in 125 years, most in 2007 with 32.
20 fixed thresholds have at least one qualifying day at Flandreau.

Days at or above 30 C (86 F)

127 years with a qualifying day

Days per year at Flandreau with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 86 in 1894.

Days at or above 30 C (86 F) per year at Flandreau
Year	Days	Decade average
1893	57	52.4
1894	86	52.4
1895	57	52.4
1896	43	52.4
1897	46	52.4
1898	36	52.4
1899	42	52.4
1900	37	23.2
1901	54	23.2
1902	16	23.2
1903	8	23.2
1904	7	23.2
1905	22	23.2
1906	24	23.2
1907	15	23.2
1908	25	23.2
1909	24	23.2
1911	50	37
1912	29	37
1916	45	37
1917	30	37
1918	31	37
1919	37	37
1920	29	40.6
1921	51	40.6
1922	44	40.6
1925	56	40.6
1926	42	40.6
1927	31	40.6
1928	24	40.6
1929	48	40.6
1930	57	57
1932	41	57
1933	56	57
1934	64	57
1935	53	57
1936	69	57
1937	58	57
1938	53	57
1939	62	57
1940	48	36.6
1941	61	36.6
1942	24	36.6
1943	38	36.6
1944	26	36.6
1945	24	36.6
1946	25	36.6
1947	45	36.6
1948	33	36.6
1949	42	36.6
1950	22	41.2
1951	18	41.2
1952	45	41.2
1953	35	41.2
1954	37	41.2
1955	59	41.2
1956	38	41.2
1957	40	41.2
1958	54	41.2
1959	64	41.2
1960	43	36.5
1961	45	36.5
1962	26	36.5
1963	40	36.5
1964	54	36.5
1965	30	36.5
1966	49	36.5
1967	23	36.5
1968	31	36.5
1969	24	36.5
1970	48	36.9
1971	26	36.9
1972	26	36.9
1973	40	36.9
1974	35	36.9
1975	39	36.9
1976	60	36.9
1977	31	36.9
1978	36	36.9
1979	28	36.9
1980	45	33.8
1981	24	33.8
1982	21	33.8
1983	54	33.8
1984	24	33.8
1985	20	33.8
1986	25	33.8
1987	41	33.8
1988	52	33.8
1989	32	33.8
1990	35	19.3
1991	34	19.3
1992	7	19.3
1993	7	19.3
1994	13	19.3
1995	24	19.3
1996	11	19.3
1997	18	19.3
1998	20	19.3
1999	24	19.3
2000	23	23.1
2001	32	23.1
2002	35	23.1
2003	28	23.1
2004	13	23.1
2005	28	23.1
2006	21	23.1
2007	32	23.1
2008	11	23.1
2009	8	23.1
2010	20	22.3
2011	31	22.3
2012	49	22.3
2013	16	22.3
2014	7	22.3
2015	15	22.3
2016	20	22.3
2017	23	22.3
2018	28	22.3
2019	14	22.3
2020	33	33.7
2021	38	33.7
2022	33	33.7
2023	40	33.7
2024	22	33.7
2025	30	33.7
2026	40	33.7

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

First to last qualifying date each year at Flandreau
Year	First date	Last date
1893	1893-05-31	1893-09-19
1894	1894-04-28	1894-09-28
1895	1895-04-24	1895-09-20
1896	1896-05-05	1896-09-08
1897	1897-04-27	1897-10-03
1898	1898-04-15	1898-09-27
1899	1899-04-24	1899-09-11
1900	1900-05-10	1900-09-09
1901	1901-04-25	1901-09-24
1902	1902-06-09	1902-09-07
1903	1903-07-06	1903-09-22
1904	1904-05-22	1904-09-28
1905	1905-06-03	1905-10-04
1906	1906-04-24	1906-09-10
1907	1907-05-12	1907-09-18
1908	1908-04-14	1908-09-22
1909	1909-05-04	1909-08-31
1911	1911-05-09	1911-09-16
1912	1912-06-25	1912-10-05
1916	1916-05-05	1916-09-05
1917	1917-05-17	1917-08-26
1918	1918-05-03	1918-08-27
1919	1919-05-29	1919-09-26
1920	1920-06-08	1920-09-21
1921	1921-05-21	1921-09-23
1922	1922-06-04	1922-10-04
1925	1925-05-19	1925-09-19
1926	1926-04-20	1926-09-01
1927	1927-06-19	1927-09-14
1928	1928-07-06	1928-10-11
1929	1929-06-10	1929-09-23
1930	1930-04-09	1930-09-24
1932	1932-05-13	1932-09-18
1933	1933-05-18	1933-09-18
1934	1934-04-29	1934-09-13
1935	1935-06-12	1935-09-24
1936	1936-05-05	1936-09-22
1937	1937-05-29	1937-10-29
1938	1938-06-20	1938-10-03
1939	1939-04-23	1939-09-22
1940	1940-05-12	1940-09-22
1941	1941-05-14	1941-09-20
1942	1942-06-04	1942-10-07
1943	1943-03-30	1943-09-02
1944	1944-05-15	1944-09-17
1945	1945-06-22	1945-10-17
1946	1946-04-17	1946-09-04
1947	1947-06-26	1947-10-05
1948	1948-05-20	1948-09-17
1949	1949-05-03	1949-08-25
1950	1950-05-23	1950-10-30
1951	1951-06-16	1951-10-01
1952	1952-04-28	1952-09-30
1953	1953-05-29	1953-10-02
1954	1954-04-14	1954-09-01
1955	1955-05-02	1955-09-18
1956	1956-05-27	1956-09-28
1957	1957-06-06	1957-09-01
1958	1958-05-10	1958-10-15
1959	1959-05-01	1959-09-09
1960	1960-04-22	1960-09-06
1961	1961-05-31	1961-09-10
1962	1962-04-24	1962-08-28
1963	1963-05-07	1963-10-05
1964	1964-04-16	1964-09-09
1965	1965-05-13	1965-08-25
1966	1966-05-22	1966-09-09
1967	1967-05-23	1967-08-26
1968	1968-05-01	1968-09-15
1969	1969-05-27	1969-09-15
1970	1970-05-08	1970-09-21
1971	1971-06-04	1971-09-08
1972	1972-05-17	1972-09-20
1973	1973-05-22	1973-09-11
1974	1974-06-04	1974-09-27
1975	1975-05-20	1975-09-11
1976	1976-06-06	1976-10-01
1977	1977-05-09	1977-09-09
1978	1978-05-26	1978-09-12
1979	1979-05-29	1979-09-10
1980	1980-04-21	1980-10-10
1981	1981-04-28	1981-09-11
1982	1982-06-24	1982-09-11
1983	1983-06-11	1983-09-28
1984	1984-07-03	1984-09-20
1985	1985-04-18	1985-08-09
1986	1986-06-01	1986-08-26
1987	1987-04-20	1987-09-27
1988	1988-05-29	1988-09-18
1989	1989-06-07	1989-09-02
1990	1990-04-22	1990-09-27
1991	1991-04-07	1991-09-07
1992	1992-05-01	1992-10-03
1993	1993-07-04	1993-09-13
1994	1994-05-24	1994-09-15
1995	1995-06-15	1995-08-25
1996	1996-05-18	1996-08-26
1997	1997-06-23	1997-10-03
1998	1998-05-19	1998-09-19
1999	1999-06-06	1999-08-28
2000	2000-05-05	2000-09-18
2001	2001-04-29	2001-09-06
2002	2002-04-16	2002-09-17
2003	2003-04-15	2003-10-20
2004	2004-04-29	2004-09-20
2005	2005-06-07	2005-09-22
2006	2006-05-24	2006-10-04
2007	2007-05-14	2007-10-07
2008	2008-07-02	2008-09-27
2009	2009-04-24	2009-08-15
2010	2010-05-23	2010-10-09
2011	2011-05-31	2011-09-29
2012	2012-04-02	2012-09-12
2013	2013-05-15	2013-09-10
2014	2014-05-31	2014-08-22
2015	2015-06-10	2015-10-12
2016	2016-05-07	2016-08-29
2017	2017-06-03	2017-09-23
2018	2018-05-17	2018-09-17
2019	2019-06-05	2019-09-18
2020	2020-06-02	2020-09-23
2021	2021-04-06	2021-09-29
2022	2022-05-13	2022-09-21
2023	2023-04-13	2023-10-03
2024	2024-04-14	2024-09-30
2025	2025-05-10	2025-10-05
2026	2026-04-17	2026-10-11

Every Fixed Threshold

Fixed thresholds at Flandreau
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	127	86	1894	40
35 C (95 F): Days	104	37	1894	4
40 C (104 F): Days	15	8	1936	1
90 F (32.2 C): Days	126	64	1894	17
100 F (37.8 C): Days	43	18	1936	1
110 F (43.3 C): Days	2	1	1936	1
0 C (32 F): Ice days (max	127	114	2013	36
0 C (32 F): Frost days (min	120	208	2013	111
-10 C (14 F): Days with min	120	115	1893	40
-20 C (-4 F): Days with min	120	56	1978	12
-30 C (-22 F): Days with min	92	25	1936	3
-40 C (-40 F): Days with min	1	1	1974	1
20 C (68 F): Tropical nights (min	115	22	1955	11
25 C (77 F): Days with min	9	2	1911	1
10 mm (0.39 in): Days with 10 mm or more rain	125	32	2007	17
25 mm (0.98 in): Days with 25 mm or more rain	125	12	2005	6
50 mm (1.97 in): Days with 50 mm or more rain	76	4	1908	1
100 mm (3.94 in): Days with 100 mm or more rain	9	1	1932	1
10 cm (3.9 in): Days with 10 cm or more snowfall	77	7	1951	1
25 cm (9.8 in): Days with 25 cm or more snowfall	9	1	1951	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Flandreau 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).

Flandreau Threshold Days by Year (USC00392984)

Key Facts for Flandreau Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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