Colstrip Threshold Days by Year (USC00241905)

19 fixed thresholds counted per year at Colstrip (USC00241905): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Colstrip Thresholds

Colstrip: days with 10 mm (0.39 in) or more of precipitation in 92 years, most in 2016 with 20.
Colstrip: days with a maximum temperature at or above 30 C (86 F) in 90 years, most in 1936 with 90.
Colstrip: days with a maximum temperature at or above 90 F (32.2 C) in 90 years, most in 1936 with 76.
Colstrip: days with a maximum temperature at or below 0 C (32 F) in 90 years, most in 1996 with 73.
19 fixed thresholds have at least one qualifying day at Colstrip.

Days at or above 30 C (86 F)

90 years with a qualifying day

Days per year at Colstrip with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 1936.

Days at or above 30 C (86 F) per year at Colstrip
Year	Days	Decade average
1928	38	53.5
1929	69	53.5
1930	61	72.5
1931	75	72.5
1932	64	72.5
1933	74	72.5
1934	80	72.5
1935	61	72.5
1936	90	72.5
1937	76	72.5
1938	67	72.5
1939	77	72.5
1940	77	61.5
1941	57	61.5
1942	56	61.5
1945	59	61.5
1946	58	61.5
1947	64	61.5
1948	64	61.5
1949	57	61.5
1950	38	54.9
1951	35	54.9
1952	62	54.9
1953	62	54.9
1954	56	54.9
1955	56	54.9
1956	55	54.9
1957	55	54.9
1958	55	54.9
1959	75	54.9
1960	72	61.2
1961	86	61.2
1962	45	61.2
1963	69	61.2
1964	52	61.2
1965	40	61.2
1966	80	61.2
1967	63	61.2
1968	47	61.2
1969	58	61.2
1970	70	60.2
1971	69	60.2
1972	50	60.2
1976	71	60.2
1977	51	60.2
1978	50	60.2
1982	45	49.9
1983	57	49.9
1984	53	49.9
1985	40	49.9
1986	43	49.9
1987	39	49.9
1988	71	49.9
1989	51	49.9
1990	57	39.3
1991	51	39.3
1992	37	39.3
1993	10	39.3
1994	43	39.3
1995	34	39.3
1996	38	39.3
1997	27	39.3
1998	59	39.3
1999	37	39.3
2000	49	43.3
2001	53	43.3
2002	50	43.3
2003	33	43.3
2004	29	43.3
2005	44	43.3
2006	53	43.3
2007	52	43.3
2008	34	43.3
2009	36	43.3
2010	36	42.4
2011	48	42.4
2012	62	42.4
2013	35	42.4
2014	32	42.4
2015	48	42.4
2016	42	42.4
2017	57	42.4
2018	35	42.4
2019	29	42.4
2020	48	60.2
2021	68	60.2
2022	62	60.2
2024	64	60.2
2025	60	60.2
2026	59	60.2

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

First to last qualifying date each year at Colstrip
Year	First date	Last date
1928	1928-05-06	1928-09-29
1929	1929-05-23	1929-09-21
1930	1930-06-11	1930-09-18
1931	1931-05-13	1931-09-18
1932	1932-05-13	1932-09-17
1933	1933-05-31	1933-10-04
1934	1934-05-05	1934-09-13
1935	1935-06-08	1935-09-23
1936	1936-05-04	1936-09-23
1937	1937-05-18	1937-09-21
1938	1938-04-30	1938-09-30
1939	1939-04-29	1939-09-21
1940	1940-05-11	1940-09-22
1941	1941-05-12	1941-09-18
1942	1942-07-02	1942-10-11
1945	1945-06-21	1945-09-08
1946	1946-04-26	1946-09-30
1947	1947-05-02	1947-10-20
1948	1948-05-17	1948-10-03
1949	1949-05-27	1949-09-23
1950	1950-06-05	1950-09-07
1951	1951-05-23	1951-08-23
1952	1952-04-28	1952-09-27
1953	1953-06-11	1953-10-10
1954	1954-05-19	1954-09-26
1955	1955-06-21	1955-10-10
1956	1956-05-19	1956-09-26
1957	1957-06-03	1957-10-02
1958	1958-05-11	1958-09-19
1959	1959-06-03	1959-09-15
1960	1960-05-11	1960-10-06
1961	1961-05-10	1961-09-16
1962	1962-04-24	1962-09-07
1963	1963-06-14	1963-10-05
1964	1964-05-17	1964-09-17
1965	1965-07-04	1965-10-09
1966	1966-05-04	1966-09-24
1967	1967-05-23	1967-09-30
1968	1968-06-02	1968-09-12
1969	1969-05-13	1969-09-18
1970	1970-05-17	1970-10-04
1971	1971-05-13	1971-09-11
1972	1972-05-16	1972-09-18
1976	1976-06-02	1976-10-02
1977	1977-05-10	1977-09-14
1978	1978-05-15	1978-09-11
1982	1982-06-23	1982-09-10
1983	1983-06-10	1983-09-16
1984	1984-05-15	1984-09-20
1985	1985-05-02	1985-09-14
1986	1986-05-03	1986-08-29
1987	1987-04-28	1987-10-03
1988	1988-05-13	1988-09-06
1989	1989-05-23	1989-09-30
1990	1990-06-09	1990-09-25
1991	1991-06-11	1991-10-16
1992	1992-05-06	1992-10-03
1993	1993-05-13	1993-08-16
1994	1994-05-27	1994-09-27
1995	1995-06-13	1995-10-11
1996	1996-06-08	1996-09-04
1997	1997-07-08	1997-10-01
1998	1998-05-26	1998-09-18
1999	1999-06-21	1999-09-06
2000	2000-06-07	2000-09-16
2001	2001-05-12	2001-10-01
2002	2002-06-16	2002-09-16
2003	2003-06-30	2003-09-08
2004	2004-06-03	2004-09-11
2005	2005-06-18	2005-10-02
2006	2006-05-19	2006-09-15
2007	2007-06-21	2007-09-23
2008	2008-07-01	2008-09-19
2009	2009-05-20	2009-09-27
2010	2010-06-29	2010-10-05
2011	2011-06-29	2011-10-05
2012	2012-06-05	2012-09-16
2013	2013-06-20	2013-09-08
2014	2014-05-29	2014-09-27
2015	2015-06-08	2015-09-27
2016	2016-06-08	2016-09-03
2017	2017-05-07	2017-09-13
2018	2018-06-05	2018-09-11
2019	2019-06-07	2019-09-17
2020	2020-06-01	2020-09-25
2021	2021-05-19	2021-10-06
2022	2022-06-17	2022-09-30
2024	2024-06-11	2024-10-16
2025	2025-05-10	2025-09-30
2026	2026-05-13	2026-08-28

Every Fixed Threshold

Fixed thresholds at Colstrip
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	90	90	1936	59
35 C (95 F): Days	89	49	1936	25
40 C (104 F): Days	28	9	1936	3
90 F (32.2 C): Days	90	76	1936	43
100 F (37.8 C): Days	69	26	1936	7
110 F (43.3 C): Days	2	1	1936	1
0 C (32 F): Ice days (max	90	73	1996	14
0 C (32 F): Frost days (min	89	207	1970	88
-10 C (14 F): Days with min	89	89	1955	16
-20 C (-4 F): Days with min	89	44	1949	5
-30 C (-22 F): Days with min	63	15	1929	1
-40 C (-40 F): Days with min	5	5	1936	1
20 C (68 F): Tropical nights (min	60	12	1936	9
25 C (77 F): Days with min	3	1	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	92	20	2016	7
25 mm (0.98 in): Days with 25 mm or more rain	69	6	2007	2
50 mm (1.97 in): Days with 50 mm or more rain	17	2	2013	1
10 cm (3.9 in): Days with 10 cm or more snowfall	58	9	2018	3
25 cm (9.8 in): Days with 25 cm or more snowfall	11	1	1932	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1928.

Download the Data

Data for Colstrip 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).

Colstrip Threshold Days by Year (USC00241905)

Key Facts for Colstrip Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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