Choteau Threshold Days by Year (USC00241737)

18 fixed thresholds counted per year at Choteau (USC00241737): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Choteau Thresholds

Choteau: days with 10 mm (0.39 in) or more of precipitation in 109 years, most in 1896 with 19.
Choteau: nights with a minimum temperature at or below 0 C (32 F) in 105 years, most in 1909 with 219.
Choteau: nights with a minimum temperature at or below -10 C (14 F) in 105 years, most in 1955 with 93.
Choteau: nights with a minimum temperature at or below -20 C (-4 F) in 105 years, most in 1936 with 46.
18 fixed thresholds have at least one qualifying day at Choteau.

Days at or above 30 C (86 F)

99 years with a qualifying day

Days per year at Choteau with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 57 in 1936.

Days at or above 30 C (86 F) per year at Choteau
Year	Days	Decade average
1893	45	39.8
1895	33	39.8
1896	39	39.8
1897	42	39.8
1906	30	19.5
1909	9	19.5
1919	35	35
1922	31	25.7
1923	16	25.7
1924	22	25.7
1925	26	25.7
1926	23	25.7
1928	15	25.7
1929	47	25.7
1930	41	35
1932	20	35
1933	33	35
1936	57	35
1937	32	35
1938	24	35
1939	38	35
1940	41	24.9
1941	22	24.9
1942	24	24.9
1943	24	24.9
1944	16	24.9
1945	23	24.9
1946	21	24.9
1947	32	24.9
1948	19	24.9
1949	27	24.9
1950	11	23.6
1951	19	23.6
1952	21	23.6
1953	27	23.6
1954	23	23.6
1955	28	23.6
1956	22	23.6
1957	28	23.6
1958	29	23.6
1959	28	23.6
1960	37	29.1
1961	49	29.1
1962	10	29.1
1963	29	29.1
1964	26	29.1
1965	15	29.1
1966	33	29.1
1967	38	29.1
1968	18	29.1
1969	36	29.1
1970	45	28.1
1971	41	28.1
1972	21	28.1
1973	33	28.1
1974	34	28.1
1975	18	28.1
1976	23	28.1
1977	20	28.1
1978	20	28.1
1979	26	28.1
1980	17	30.6
1981	38	30.6
1982	23	30.6
1983	27	30.6
1984	46	30.6
1985	28	30.6
1986	27	30.6
1987	23	30.6
1988	52	30.6
1989	25	30.6
1990	39	31.4
1991	38	31.4
1992	27	31.4
1993	6	31.4
1994	47	31.4
2004	11	25.2
2005	29	25.2
2006	35	25.2
2007	39	25.2
2008	18	25.2
2009	19	25.2
2010	10	24.8
2011	28	24.8
2012	31	24.8
2013	26	24.8
2014	20	24.8
2015	33	24.8
2016	20	24.8
2017	41	24.8
2018	26	24.8
2019	13	24.8
2020	28	33.4
2021	39	33.4
2022	49	33.4
2023	26	33.4
2024	34	33.4
2025	29	33.4
2026	29	33.4

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

First to last qualifying date each year at Choteau
Year	First date	Last date
1893	1893-06-11	1893-09-08
1895	1895-05-18	1895-10-06
1896	1896-06-12	1896-09-06
1897	1897-05-05	1897-10-06
1906	1906-05-10	1906-09-30
1909	1909-07-16	1909-08-30
1919	1919-05-19	1919-09-05
1922	1922-06-20	1922-09-25
1923	1923-06-12	1923-09-08
1924	1924-07-01	1924-09-05
1925	1925-06-18	1925-09-01
1926	1926-06-26	1926-08-29
1928	1928-05-22	1928-08-12
1929	1929-06-28	1929-09-01
1930	1930-06-07	1930-09-03
1932	1932-06-21	1932-08-18
1933	1933-06-15	1933-10-07
1936	1936-05-14	1936-09-21
1937	1937-06-21	1937-09-12
1938	1938-07-14	1938-09-24
1939	1939-06-30	1939-08-27
1940	1940-06-12	1940-09-11
1941	1941-05-24	1941-08-18
1942	1942-07-02	1942-09-05
1943	1943-07-06	1943-10-03
1944	1944-06-30	1944-09-07
1945	1945-06-21	1945-09-04
1946	1946-07-11	1946-08-24
1947	1947-07-02	1947-09-04
1948	1948-06-08	1948-09-14
1949	1949-06-09	1949-09-23
1950	1950-06-30	1950-09-04
1951	1951-07-13	1951-08-22
1952	1952-06-05	1952-09-26
1953	1953-07-09	1953-09-12
1954	1954-06-22	1954-08-29
1955	1955-07-14	1955-09-06
1956	1956-06-04	1956-08-24
1957	1957-06-04	1957-09-07
1958	1958-05-20	1958-09-11
1959	1959-06-12	1959-09-13
1960	1960-05-12	1960-09-03
1961	1961-06-15	1961-08-29
1962	1962-07-21	1962-08-25
1963	1963-06-18	1963-10-02
1964	1964-05-19	1964-08-18
1965	1965-06-11	1965-08-12
1966	1966-05-26	1966-09-23
1967	1967-07-12	1967-09-29
1968	1968-06-26	1968-09-11
1969	1969-06-04	1969-09-03
1970	1970-06-03	1970-09-01
1971	1971-06-22	1971-10-09
1972	1972-05-30	1972-08-30
1973	1973-06-22	1973-08-22
1974	1974-06-12	1974-09-25
1975	1975-07-04	1975-08-07
1976	1976-06-30	1976-09-06
1977	1977-06-01	1977-08-19
1978	1978-06-23	1978-09-05
1979	1979-06-12	1979-09-16
1980	1980-05-21	1980-09-07
1981	1981-06-26	1981-09-19
1982	1982-06-21	1982-09-10
1983	1983-07-05	1983-09-02
1984	1984-05-29	1984-09-18
1985	1985-06-19	1985-08-25
1986	1986-05-27	1986-08-29
1987	1987-04-28	1987-09-01
1988	1988-05-16	1988-09-07
1989	1989-06-29	1989-08-13
1990	1990-06-23	1990-09-23
1991	1991-07-03	1991-10-12
1992	1992-05-05	1992-10-02
1993	1993-06-21	1993-08-11
1994	1994-06-20	1994-09-25
2004	2004-07-14	2004-08-17
2005	2005-06-22	2005-09-04
2006	2006-05-16	2006-08-29
2007	2007-06-21	2007-09-04
2008	2008-05-17	2008-08-26
2009	2009-07-18	2009-09-24
2010	2010-06-28	2010-08-27
2011	2011-06-28	2011-09-25
2012	2012-05-15	2012-08-29
2013	2013-07-01	2013-09-06
2014	2014-07-03	2014-09-26
2015	2015-06-08	2015-09-25
2016	2016-06-07	2016-09-02
2017	2017-06-08	2017-09-12
2018	2018-06-09	2018-09-07
2019	2019-07-23	2019-09-04
2020	2020-06-26	2020-09-12
2021	2021-06-02	2021-09-09
2022	2022-06-17	2022-09-28
2023	2023-06-30	2023-09-15
2024	2024-06-23	2024-09-25
2025	2025-05-29	2025-09-25
2026	2026-05-25	2026-08-27

Every Fixed Threshold

Fixed thresholds at Choteau
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	99	57	1936	29
35 C (95 F): Days	56	17	1893	4
40 C (104 F): Days	1	4	1893	4
90 F (32.2 C): Days	97	34	1893	14
100 F (37.8 C): Days	10	7	1893	2
0 C (32 F): Ice days (max	99	72	1978	12
0 C (32 F): Frost days (min	105	219	1909	99
-10 C (14 F): Days with min	105	93	1955	23
-20 C (-4 F): Days with min	105	46	1936	8
-30 C (-22 F): Days with min	82	16	1936	2
-40 C (-40 F): Days with min	10	3	1936	1
20 C (68 F): Tropical nights (min	8	1	1906	1
10 mm (0.39 in): Days with 10 mm or more rain	109	19	1896	14
25 mm (0.98 in): Days with 25 mm or more rain	73	5	1909	1
50 mm (1.97 in): Days with 50 mm or more rain	12	2	1909	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	92	7	1893	3
25 cm (9.8 in): Days with 25 cm or more snowfall	13	2	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 1893.

Download the Data

Data for Choteau 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).

Choteau Threshold Days by Year (USC00241737)

Key Facts for Choteau Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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