Tarkio Threshold Days by Year (USW00014945)

20 fixed thresholds counted per year at Tarkio (USW00014945): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tarkio Thresholds

Tarkio: days with a maximum temperature at or above 30 C (86 F) in 71 years, most in 1956 with 105.
Tarkio: days with a maximum temperature at or above 90 F (32.2 C) in 71 years, most in 1934 with 83.
Tarkio: days with a maximum temperature at or below 0 C (32 F) in 71 years, most in 1929 with 58.
Tarkio: nights with a minimum temperature at or below 0 C (32 F) in 71 years, most in 1936 with 154.
20 fixed thresholds have at least one qualifying day at Tarkio.

Days at or above 30 C (86 F)

71 years with a qualifying day

Days per year at Tarkio with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 1956.

Days at or above 30 C (86 F) per year at Tarkio
Year	Days	Decade average
1915	22	61.8
1916	70	61.8
1917	55	61.8
1918	85	61.8
1919	77	61.8
1920	55	55.5
1921	75	55.5
1922	64	55.5
1923	58	55.5
1924	44	55.5
1925	67	55.5
1926	58	55.5
1927	55	55.5
1928	42	55.5
1929	37	55.5
1930	66	75.2
1931	83	75.2
1932	53	75.2
1933	66	75.2
1934	99	75.2
1935	57	75.2
1936	93	75.2
1937	73	75.2
1938	77	75.2
1939	85	75.2
1940	59	59.4
1941	62	59.4
1942	59	59.4
1945	43	59.4
1946	54	59.4
1947	72	59.4
1948	70	59.4
1949	56	59.4
1950	32	71.9
1951	37	71.9
1952	88	71.9
1953	95	71.9
1954	87	71.9
1955	90	71.9
1956	105	71.9
1957	60	71.9
1958	55	71.9
1959	70	71.9
1960	59	62.8
1961	59	62.8
1962	69	62.8
1963	84	62.8
1964	68	62.8
1965	50	62.8
1966	56	62.8
1967	54	62.8
1968	68	62.8
1969	61	62.8
1970	76	68.8
1971	77	68.8
1972	67	68.8
1973	65	68.8
1974	57	68.8
1975	75	68.8
1976	72	68.8
1977	61	68.8
1987	69	72.5
1988	76	72.5
1992	26	52
1997	66	52
1998	64	52
2002	76	52
2003	54	52
2004	24	52
2006	48	52
2007	58	52

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

First to last qualifying date each year at Tarkio
Year	First date	Last date
1915	1915-04-28	1915-09-13
1916	1916-04-12	1916-10-07
1917	1917-04-22	1917-09-17
1918	1918-05-03	1918-10-15
1919	1919-05-29	1919-10-02
1920	1920-06-08	1920-10-11
1921	1921-04-23	1921-10-16
1922	1922-06-05	1922-10-06
1923	1923-06-03	1923-09-06
1924	1924-04-15	1924-10-29
1925	1925-05-20	1925-09-19
1926	1926-04-29	1926-09-21
1927	1927-04-26	1927-10-24
1928	1928-03-22	1928-10-10
1929	1929-04-04	1929-09-27
1930	1930-04-04	1930-09-25
1931	1931-04-08	1931-10-10
1932	1932-05-02	1932-09-19
1933	1933-05-18	1933-09-18
1934	1934-05-01	1934-10-08
1935	1935-06-15	1935-09-24
1936	1936-04-13	1936-09-22
1937	1937-05-20	1937-10-29
1938	1938-03-21	1938-10-16
1939	1939-04-23	1939-10-24
1940	1940-04-14	1940-10-26
1941	1941-05-14	1941-09-21
1942	1942-04-04	1942-09-16
1945	1945-05-20	1945-09-23
1946	1946-03-31	1946-09-26
1947	1947-05-14	1947-10-21
1948	1948-04-18	1948-09-21
1949	1949-04-25	1949-10-08
1950	1950-04-22	1950-10-31
1951	1951-04-28	1951-10-03
1952	1952-04-28	1952-09-30
1953	1953-04-22	1953-10-18
1954	1954-04-05	1954-10-09
1955	1955-04-18	1955-10-11
1956	1956-04-01	1956-10-13
1957	1957-06-04	1957-09-24
1958	1958-04-17	1958-10-16
1959	1959-05-01	1959-09-20
1960	1960-04-22	1960-10-11
1961	1961-04-20	1961-09-10
1962	1962-04-21	1962-09-13
1963	1963-05-08	1963-10-19
1964	1964-04-16	1964-09-09
1965	1965-04-22	1965-10-10
1966	1966-05-05	1966-10-14
1967	1967-04-16	1967-09-26
1968	1968-03-30	1968-09-02
1969	1969-05-26	1969-10-04
1970	1970-04-27	1970-09-21
1971	1971-06-03	1971-10-01
1972	1972-04-06	1972-09-24
1973	1973-05-18	1973-09-21
1974	1974-05-20	1974-09-26
1975	1975-04-17	1975-10-13
1976	1976-06-08	1976-10-03
1977	1977-04-09	1977-09-08
1987	1987-04-20	1987-10-31
1988	1988-05-13	1988-09-18
1992	1992-04-15	1992-09-16
1997	1997-06-02	1997-10-09
1998	1998-04-27	1998-09-30
2002	2002-04-15	2002-10-02
2003	2003-04-03	2003-10-20
2004	2004-04-17	2004-09-20
2006	2006-04-14	2006-10-04
2007	2007-04-30	2007-10-07

Every Fixed Threshold

Fixed thresholds at Tarkio
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	71	105	1956	58
35 C (95 F): Days	68	55	1934	1
40 C (104 F): Days	21	23	1934	1
45 C (113 F): Days	1	1	1936	1
90 F (32.2 C): Days	71	83	1934	22
100 F (37.8 C): Days	43	40	1934	6
110 F (43.3 C): Days	2	7	1934	3
0 C (32 F): Ice days (max	71	58	1929	52
0 C (32 F): Frost days (min	71	154	1936	132
-10 C (14 F): Days with min	71	61	1950	52
-20 C (-4 F): Days with min	63	25	1936	3
-30 C (-22 F): Days with min	8	2	1947	1
20 C (68 F): Tropical nights (min	71	54	1934	38
25 C (77 F): Days with min	20	6	1936	4
10 mm (0.39 in): Days with 10 mm or more rain	71	41	1951	28
25 mm (0.98 in): Days with 25 mm or more rain	71	20	1973	16
50 mm (1.97 in): Days with 50 mm or more rain	60	6	1973	6
100 mm (3.94 in): Days with 100 mm or more rain	10	1	1925	1
10 cm (3.9 in): Days with 10 cm or more snowfall	56	6	1952	4
25 cm (9.8 in): Days with 25 cm or more snowfall	10	1	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Tarkio 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Tarkio Threshold Days by Year (USW00014945)

Key Facts for Tarkio Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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