De Smet Threshold Days by Year (USC00392302)

20 fixed thresholds counted per year at De Smet (USC00392302): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for De Smet Thresholds

De Smet: days with 10 mm (0.39 in) or more of precipitation in 110 years, most in 2019 with 38.
De Smet: days with 25 mm (0.98 in) or more of precipitation in 109 years, most in 1977 with 12.
De Smet: nights with a minimum temperature at or below 0 C (32 F) in 104 years, most in 2002 with 204.
De Smet: nights with a minimum temperature at or below -10 C (14 F) in 104 years, most in 1936 with 100.
20 fixed thresholds have at least one qualifying day at De Smet.

Days at or above 30 C (86 F)

102 years with a qualifying day

Days per year at De Smet with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 73 in 1939.

Days at or above 30 C (86 F) per year at De Smet
Year	Days	Decade average
1898	39	32
1899	25	32
1900	37	33
1901	54	33
1902	16	33
1906	27	33
1907	24	33
1909	40	33
1913	48	48
1924	13	35
1925	47	35
1926	49	35
1927	31	35
1931	61	60.7
1932	52	60.7
1933	68	60.7
1934	66	60.7
1935	57	60.7
1936	68	60.7
1937	45	60.7
1938	56	60.7
1939	73	60.7
1940	56	43.2
1941	58	43.2
1942	24	43.2
1943	47	43.2
1946	34	43.2
1947	40	43.2
1951	23	45.8
1952	57	45.8
1953	41	45.8
1954	43	45.8
1955	56	45.8
1957	40	45.8
1958	48	45.8
1959	58	45.8
1960	43	38.8
1961	50	38.8
1962	23	38.8
1963	33	38.8
1964	55	38.8
1965	35	38.8
1966	43	38.8
1967	38	38.8
1968	35	38.8
1969	33	38.8
1970	61	49.8
1971	48	49.8
1972	42	49.8
1973	48	49.8
1974	53	49.8
1975	52	49.8
1976	66	49.8
1977	42	49.8
1979	36	49.8
1980	51	41.8
1981	38	41.8
1982	34	41.8
1983	61	41.8
1984	34	41.8
1985	30	41.8
1986	22	41.8
1987	56	41.8
1988	62	41.8
1989	30	41.8
1990	31	20.6
1991	30	20.6
1992	8	20.6
1993	10	20.6
1994	13	20.6
1995	29	20.6
1996	11	20.6
1997	25	20.6
1998	25	20.6
1999	24	20.6
2000	28	25.9
2001	32	25.9
2002	41	25.9
2003	23	25.9
2004	14	25.9
2005	36	25.9
2006	32	25.9
2007	28	25.9
2008	14	25.9
2009	11	25.9
2010	27	28.3
2011	35	28.3
2012	62	28.3
2013	36	28.3
2014	11	28.3
2015	31	28.3
2016	23	28.3
2017	23	28.3
2018	21	28.3
2019	14	28.3
2020	26	34
2021	47	34
2022	29	34
2023	43	34
2024	16	34
2025	37	34
2026	40	34

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

First to last qualifying date each year at De Smet
Year	First date	Last date
1898	1898-05-24	1898-09-29
1899	1899-06-17	1899-09-11
1900	1900-04-21	1900-09-01
1901	1901-04-26	1901-09-22
1902	1902-06-09	1902-09-07
1906	1906-04-24	1906-09-10
1907	1907-06-16	1907-10-06
1909	1909-05-04	1909-10-06
1913	1913-04-30	1913-10-03
1924	1924-06-22	1924-09-03
1925	1925-05-19	1925-09-19
1926	1926-04-20	1926-09-16
1927	1927-06-19	1927-10-26
1931	1931-05-15	1931-09-13
1932	1932-05-13	1932-10-01
1933	1933-05-18	1933-09-29
1934	1934-04-29	1934-09-13
1935	1935-06-09	1935-09-24
1936	1936-05-05	1936-09-22
1937	1937-05-28	1937-09-21
1938	1938-04-30	1938-10-04
1939	1939-04-23	1939-09-22
1940	1940-05-13	1940-09-22
1941	1941-05-14	1941-09-20
1942	1942-06-03	1942-10-07
1943	1943-03-30	1943-09-02
1946	1946-06-06	1946-09-05
1947	1947-06-26	1947-10-05
1951	1951-07-15	1951-10-01
1952	1952-04-27	1952-09-30
1953	1953-05-29	1953-10-02
1954	1954-05-22	1954-09-02
1955	1955-05-01	1955-09-18
1957	1957-06-30	1957-09-01
1958	1958-04-16	1958-10-15
1959	1959-05-01	1959-09-09
1960	1960-06-26	1960-09-06
1961	1961-06-08	1961-10-06
1962	1962-04-24	1962-08-28
1963	1963-05-07	1963-10-06
1964	1964-04-16	1964-09-10
1965	1965-04-29	1965-09-02
1966	1966-05-26	1966-08-31
1967	1967-05-22	1967-09-08
1968	1968-04-30	1968-08-23
1969	1969-05-26	1969-09-15
1970	1970-05-18	1970-09-09
1971	1971-06-11	1971-09-14
1972	1972-05-16	1972-09-22
1973	1973-06-07	1973-09-01
1974	1974-06-03	1974-09-27
1975	1975-05-19	1975-09-11
1976	1976-06-07	1976-09-11
1977	1977-04-09	1977-09-17
1979	1979-05-28	1979-09-25
1980	1980-04-20	1980-10-09
1981	1981-04-27	1981-09-12
1982	1982-06-28	1982-09-10
1983	1983-05-27	1983-09-27
1984	1984-07-03	1984-09-20
1985	1985-04-17	1985-09-01
1986	1986-06-15	1986-08-25
1987	1987-04-28	1987-09-26
1988	1988-05-12	1988-09-17
1989	1989-06-06	1989-08-22
1990	1990-04-22	1990-09-26
1991	1991-05-14	1991-09-06
1992	1992-04-30	1992-10-02
1993	1993-07-02	1993-08-26
1994	1994-06-14	1994-09-19
1995	1995-06-16	1995-08-24
1996	1996-06-11	1996-08-26
1997	1997-05-17	1997-10-02
1998	1998-06-24	1998-09-20
1999	1999-06-08	1999-08-28
2000	2000-05-05	2000-09-16
2001	2001-05-14	2001-09-05
2002	2002-05-29	2002-09-16
2003	2003-04-14	2003-09-07
2004	2004-04-28	2004-09-19
2005	2005-06-06	2005-09-11
2006	2006-05-23	2006-08-23
2007	2007-05-13	2007-10-06
2008	2008-07-01	2008-09-26
2009	2009-04-23	2009-08-14
2010	2010-05-22	2010-08-30
2011	2011-05-30	2011-09-28
2012	2012-04-01	2012-09-16
2013	2013-05-13	2013-09-22
2014	2014-05-27	2014-09-04
2015	2015-06-08	2015-10-10
2016	2016-05-06	2016-08-28
2017	2017-06-02	2017-09-22
2018	2018-05-25	2018-09-16
2019	2019-06-04	2019-09-17
2020	2020-06-01	2020-08-27
2021	2021-04-05	2021-09-28
2022	2022-06-12	2022-09-20
2023	2023-05-30	2023-10-02
2024	2024-05-17	2024-09-29
2025	2025-05-10	2025-10-04
2026	2026-04-22	2026-10-10

Every Fixed Threshold

Fixed thresholds at De Smet
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	102	73	1939	40
35 C (95 F): Days	83	39	1936	4
40 C (104 F): Days	15	14	1936	1
90 F (32.2 C): Days	101	59	1976	17
100 F (37.8 C): Days	40	30	1936	3
110 F (43.3 C): Days	2	3	1936	3
0 C (32 F): Ice days (max	102	103	1940	33
0 C (32 F): Frost days (min	104	204	2002	101
-10 C (14 F): Days with min	104	100	1936	33
-20 C (-4 F): Days with min	104	50	1936	10
-30 C (-22 F): Days with min	71	20	1936	1
-40 C (-40 F): Days with min	1	1	1899	1
20 C (68 F): Tropical nights (min	102	28	2002	15
25 C (77 F): Days with min	14	5	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	110	38	2019	12
25 mm (0.98 in): Days with 25 mm or more rain	109	12	1977	3
50 mm (1.97 in): Days with 50 mm or more rain	65	4	1977	1
100 mm (3.94 in): Days with 100 mm or more rain	4	2	1984	1
10 cm (3.9 in): Days with 10 cm or more snowfall	78	10	1985	1
25 cm (9.8 in): Days with 25 cm or more snowfall	16	3	2019	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

Data for De Smet 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).

De Smet Threshold Days by Year (USC00392302)

Key Facts for De Smet Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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