Chinook Threshold Days by Year (USC00241722)

20 fixed thresholds counted per year at Chinook (USC00241722): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chinook Thresholds

Chinook: days with 10 mm (0.39 in) or more of precipitation in 107 years, most in 2013 with 19.
Chinook: nights with a minimum temperature at or below 0 C (32 F) in 104 years, most in 1945 with 223.
Chinook: nights with a minimum temperature at or below -10 C (14 F) in 104 years, most in 1928 with 115.
Chinook: nights with a minimum temperature at or below -20 C (-4 F) in 104 years, most in 1936 with 67.
20 fixed thresholds have at least one qualifying day at Chinook.

Days at or above 30 C (86 F)

103 years with a qualifying day

Days per year at Chinook with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 81 in 1919.

Days at or above 30 C (86 F) per year at Chinook
Year	Days	Decade average
1896	56	58
1897	60	58
1906	48	48
1912	17	43.1
1913	28	43.1
1914	54	43.1
1915	22	43.1
1917	49	43.1
1918	51	43.1
1919	81	43.1
1920	55	45.1
1921	63	45.1
1922	46	45.1
1923	38	45.1
1924	31	45.1
1925	34	45.1
1927	54	45.1
1928	40	45.1
1930	59	51.6
1931	41	51.6
1932	40	51.6
1933	57	51.6
1934	49	51.6
1935	42	51.6
1936	71	51.6
1937	47	51.6
1938	49	51.6
1939	61	51.6
1941	45	43.4
1942	28	43.4
1943	46	43.4
1944	36	43.4
1945	44	43.4
1946	52	43.4
1947	47	43.4
1948	49	43.4
1949	44	43.4
1950	24	39
1951	25	39
1952	43	39
1953	48	39
1954	38	39
1955	39	39
1956	48	39
1957	47	39
1958	46	39
1959	32	39
1960	51	51.9
1961	77	51.9
1962	46	51.9
1963	68	51.9
1964	49	51.9
1965	40	51.9
1966	62	51.9
1967	58	51.9
1968	30	51.9
1969	38	51.9
1970	44	39.6
1971	43	39.6
1972	38	39.6
1973	43	39.6
1974	35	39.6
1975	26	39.6
1976	48	39.6
1981	46	46.3
1984	57	46.3
1989	36	46.3
1990	45	38.4
1991	48	38.4
1992	34	38.4
1993	19	38.4
1994	52	38.4
1995	28	38.4
1996	42	38.4
1997	33	38.4
1998	53	38.4
1999	30	38.4
2000	36	42
2001	55	42
2002	31	42
2003	59	42
2004	22	42
2005	35	42
2006	61	42
2007	48	42
2008	37	42
2009	36	42
2010	23	39.1
2011	46	39.1
2012	50	39.1
2013	44	39.1
2014	39	39.1
2015	40	39.1
2016	31	39.1
2017	53	39.1
2018	33	39.1
2019	32	39.1
2020	36	41.2
2021	56	41.2
2022	51	41.2
2023	31	41.2
2024	42	41.2
2026	31	41.2

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

First to last qualifying date each year at Chinook
Year	First date	Last date
1896	1896-05-25	1896-09-28
1897	1897-04-30	1897-09-22
1906	1906-05-09	1906-09-20
1912	1912-05-15	1912-08-24
1913	1913-04-13	1913-09-17
1914	1914-05-02	1914-09-17
1915	1915-06-24	1915-09-05
1917	1917-05-13	1917-10-03
1918	1918-05-03	1918-08-31
1919	1919-05-22	1919-09-18
1920	1920-06-27	1920-09-02
1921	1921-06-06	1921-09-04
1922	1922-05-24	1922-09-27
1923	1923-05-25	1923-09-14
1924	1924-05-14	1924-09-06
1925	1925-06-20	1925-09-04
1927	1927-06-26	1927-10-18
1928	1928-04-28	1928-09-19
1930	1930-05-02	1930-09-05
1931	1931-05-13	1931-09-27
1932	1932-05-12	1932-09-07
1933	1933-05-30	1933-09-17
1934	1934-05-14	1934-10-10
1935	1935-06-22	1935-09-21
1936	1936-05-04	1936-09-21
1937	1937-06-02	1937-09-19
1938	1938-05-26	1938-09-24
1939	1939-04-28	1939-09-18
1941	1941-05-11	1941-08-25
1942	1942-04-21	1942-10-09
1943	1943-04-19	1943-10-04
1944	1944-05-15	1944-09-14
1945	1945-05-30	1945-09-04
1946	1946-04-26	1946-09-15
1947	1947-04-28	1947-10-04
1948	1948-05-31	1948-09-27
1949	1949-05-10	1949-09-09
1950	1950-06-20	1950-09-05
1951	1951-05-22	1951-08-06
1952	1952-04-25	1952-09-27
1953	1953-05-06	1953-09-16
1954	1954-05-19	1954-08-31
1955	1955-07-14	1955-09-12
1956	1956-05-19	1956-09-26
1957	1957-05-02	1957-10-02
1958	1958-05-11	1958-09-12
1959	1959-06-02	1959-08-17
1960	1960-05-12	1960-10-06
1961	1961-05-29	1961-10-16
1962	1962-04-19	1962-09-27
1963	1963-05-30	1963-10-03
1964	1964-05-19	1964-09-18
1965	1965-06-10	1965-08-22
1966	1966-05-04	1966-09-22
1967	1967-05-22	1967-09-29
1968	1968-04-29	1968-08-27
1969	1969-06-04	1969-09-12
1970	1970-06-02	1970-08-31
1971	1971-05-13	1971-10-06
1972	1972-05-17	1972-08-30
1973	1973-05-15	1973-09-30
1974	1974-06-13	1974-09-26
1975	1975-06-24	1975-09-15
1976	1976-05-13	1976-09-29
1981	1981-06-26	1981-09-19
1984	1984-05-14	1984-09-18
1989	1989-05-10	1989-09-16
1990	1990-06-23	1990-09-25
1991	1991-06-02	1991-10-11
1992	1992-04-29	1992-10-01
1993	1993-05-11	1993-09-11
1994	1994-05-09	1994-09-25
1995	1995-05-30	1995-09-12
1996	1996-06-07	1996-08-30
1997	1997-05-12	1997-10-01
1998	1998-05-04	1998-09-18
1999	1999-05-25	1999-09-24
2000	2000-05-02	2000-09-18
2001	2001-06-22	2001-09-26
2002	2002-06-23	2002-09-17
2003	2003-05-26	2003-09-08
2004	2004-06-05	2004-09-02
2005	2005-06-22	2005-09-09
2006	2006-05-17	2006-09-13
2007	2007-06-21	2007-09-04
2008	2008-05-18	2008-08-31
2009	2009-05-31	2009-09-25
2010	2010-06-29	2010-09-29
2011	2011-06-24	2011-10-02
2012	2012-04-24	2012-09-15
2013	2013-05-13	2013-09-17
2014	2014-05-24	2014-09-26
2015	2015-06-07	2015-09-13
2016	2016-05-05	2016-09-28
2017	2017-05-06	2017-09-12
2018	2018-05-17	2018-09-09
2019	2019-05-31	2019-09-17
2020	2020-06-01	2020-09-07
2021	2021-05-18	2021-10-06
2022	2022-06-19	2022-09-29
2023	2023-05-17	2023-09-17
2024	2024-06-24	2024-09-26
2026	2026-05-14	2026-09-26

Every Fixed Threshold

Fixed thresholds at Chinook
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	103	81	1919	31
35 C (95 F): Days	102	36	1936	9
40 C (104 F): Days	23	10	1936	1
90 F (32.2 C): Days	103	58	1961	17
100 F (37.8 C): Days	57	15	1936	4
110 F (43.3 C): Days	1	1	1917	1
0 C (32 F): Ice days (max	103	94	1937	21
0 C (32 F): Frost days (min	104	223	1945	116
-10 C (14 F): Days with min	104	115	1928	43
-20 C (-4 F): Days with min	104	67	1936	10
-30 C (-22 F): Days with min	99	27	1936	7
-40 C (-40 F): Days with min	28	6	1950	2
20 C (68 F): Tropical nights (min	32	6	1934	1
25 C (77 F): Days with min	1	0	n/a	1
10 mm (0.39 in): Days with 10 mm or more rain	107	19	2013	11
25 mm (0.98 in): Days with 25 mm or more rain	77	5	2004	5
50 mm (1.97 in): Days with 50 mm or more rain	22	2	2024	2
100 mm (3.94 in): Days with 100 mm or more rain	1	0	n/a	1
10 cm (3.9 in): Days with 10 cm or more snowfall	59	7	1996	1
25 cm (9.8 in): Days with 25 cm or more snowfall	7	2	1933	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Chinook 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).

Chinook Threshold Days by Year (USC00241722)

Key Facts for Chinook Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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