Missoula 6 NW WFO Threshold Days by Year (USC00245740)

17 fixed thresholds counted per year at Missoula 6 NW WFO (USC00245740): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Missoula 6 NW WFO Thresholds

Missoula 6 NW WFO: days with 10 mm (0.39 in) or more of precipitation in 84 years, most in 1897 with 17.
Missoula 6 NW WFO: days with a maximum temperature at or above 30 C (86 F) in 83 years, most in 1961 with 68.
Missoula 6 NW WFO: days with a maximum temperature at or above 90 F (32.2 C) in 83 years, most in 1961 with 45.
Missoula 6 NW WFO: days with a maximum temperature at or below 0 C (32 F) in 83 years, most in 1955 with 67.
17 fixed thresholds have at least one qualifying day at Missoula 6 NW WFO.

Days at or above 30 C (86 F)

83 years with a qualifying day

Days per year at Missoula 6 NW WFO with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 68 in 1961.

Days at or above 30 C (86 F) per year at Missoula 6 NW WFO
Year	Days	Decade average
1894	36	29.8
1895	22	29.8
1896	34	29.8
1897	26	29.8
1899	31	29.8
1902	33	35.8
1904	62	35.8
1905	48	35.8
1907	23	35.8
1909	13	35.8
1910	49	39.2
1911	37	39.2
1912	25	39.2
1913	37	39.2
1915	36	39.2
1916	30	39.2
1917	47	39.2
1918	44	39.2
1919	48	39.2
1925	49	41.6
1926	48	41.6
1927	27	41.6
1928	36	41.6
1929	48	41.6
1930	45	47.4
1931	51	47.4
1932	40	47.4
1933	50	47.4
1934	41	47.4
1935	40	47.4
1936	60	47.4
1937	51	47.4
1938	49	47.4
1939	47	47.4
1940	55	37.7
1941	43	37.7
1942	39	37.7
1943	34	37.7
1944	28	37.7
1946	32	37.7
1947	36	37.7
1948	23	37.7
1949	49	37.7
1950	39	42.7
1951	33	42.7
1952	38	42.7
1953	46	42.7
1954	33	42.7
1955	51	42.7
1956	43	42.7
1957	46	42.7
1958	57	42.7
1959	41	42.7
1960	45	39.8
1961	68	39.8
1962	30	39.8
1963	40	39.8
1964	28	39.8
1965	28	39.8
2003	52	45.9
2004	32	45.9
2005	43	45.9
2006	61	45.9
2007	56	45.9
2008	32	45.9
2009	45	45.9
2010	29	45.2
2011	45	45.2
2012	46	45.2
2013	64	45.2
2014	44	45.2
2015	44	45.2
2016	39	45.2
2017	68	45.2
2018	36	45.2
2019	37	45.2
2020	44	52.9
2021	60	52.9
2022	63	52.9
2023	48	52.9
2024	54	52.9
2025	56	52.9
2026	45	52.9

For each year, a bar from the first to the last day at Missoula 6 NW WFO meeting 30 C (86 F).

First to last qualifying date each year at Missoula 6 NW WFO
Year	First date	Last date
1894	1894-05-31	1894-08-28
1895	1895-06-29	1895-09-02
1896	1896-06-16	1896-09-07
1897	1897-05-05	1897-08-31
1899	1899-06-16	1899-09-26
1902	1902-05-13	1902-08-27
1904	1904-06-16	1904-09-29
1905	1905-05-16	1905-08-27
1907	1907-05-22	1907-08-23
1909	1909-06-01	1909-09-09
1910	1910-04-24	1910-08-20
1911	1911-05-05	1911-09-02
1912	1912-06-19	1912-09-30
1913	1913-05-26	1913-09-17
1915	1915-06-23	1915-08-31
1916	1916-06-16	1916-09-03
1917	1917-05-15	1917-09-23
1918	1918-05-04	1918-09-21
1919	1919-05-20	1919-09-19
1925	1925-06-18	1925-09-04
1926	1926-04-29	1926-08-29
1927	1927-06-07	1927-08-18
1928	1928-05-21	1928-09-05
1929	1929-05-21	1929-08-31
1930	1930-05-27	1930-09-04
1931	1931-05-12	1931-09-06
1932	1932-06-13	1932-09-07
1933	1933-06-03	1933-09-05
1934	1934-05-24	1934-09-06
1935	1935-06-22	1935-09-14
1936	1936-04-17	1936-09-21
1937	1937-06-02	1937-09-18
1938	1938-05-26	1938-09-29
1939	1939-04-28	1939-09-21
1940	1940-05-10	1940-09-11
1941	1941-05-11	1941-08-22
1942	1942-06-30	1942-09-08
1943	1943-06-29	1943-09-26
1944	1944-05-27	1944-09-12
1946	1946-06-03	1946-09-14
1947	1947-07-01	1947-09-04
1948	1948-06-07	1948-09-15
1949	1949-05-11	1949-09-02
1950	1950-06-20	1950-09-04
1951	1951-07-03	1951-08-22
1952	1952-07-03	1952-09-27
1953	1953-06-11	1953-09-16
1954	1954-05-18	1954-09-02
1955	1955-06-20	1955-09-08
1956	1956-05-31	1956-09-20
1957	1957-06-02	1957-09-30
1958	1958-05-20	1958-09-12
1959	1959-06-12	1959-09-12
1960	1960-05-11	1960-09-03
1961	1961-05-25	1961-08-28
1962	1962-06-23	1962-08-27
1963	1963-06-17	1963-09-12
1964	1964-06-23	1964-08-18
1965	1965-06-10	1965-08-19
2003	2003-05-24	2003-09-06
2004	2004-06-22	2004-08-31
2005	2005-06-21	2005-09-08
2006	2006-05-15	2006-09-12
2007	2007-06-02	2007-09-03
2008	2008-05-17	2008-08-26
2009	2009-05-18	2009-09-24
2010	2010-06-28	2010-09-28
2011	2011-06-22	2011-09-24
2012	2012-05-15	2012-09-08
2013	2013-05-12	2013-09-16
2014	2014-05-23	2014-09-24
2015	2015-06-07	2015-09-25
2016	2016-06-04	2016-08-30
2017	2017-05-23	2017-09-12
2018	2018-07-05	2018-09-07
2019	2019-06-12	2019-09-15
2020	2020-05-30	2020-09-12
2021	2021-05-17	2021-09-08
2022	2022-06-16	2022-09-07
2023	2023-05-01	2023-09-16
2024	2024-06-06	2024-09-25
2025	2025-05-25	2025-09-20
2026	2026-06-24	2026-09-01

Every Fixed Threshold

Fixed thresholds at Missoula 6 NW WFO
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	83	68	1961	45
35 C (95 F): Days	81	24	2022	8
40 C (104 F): Days	2	1	1936	1
90 F (32.2 C): Days	83	45	1961	28
100 F (37.8 C): Days	33	6	1936	1
0 C (32 F): Ice days (max	83	67	1955	9
0 C (32 F): Frost days (min	82	223	1895	96
-10 C (14 F): Days with min	82	69	1895	5
-20 C (-4 F): Days with min	74	28	1916	3
-30 C (-22 F): Days with min	23	5	1950	1
20 C (68 F): Tropical nights (min	15	2	2007	1
10 mm (0.39 in): Days with 10 mm or more rain	84	17	1897	8
25 mm (0.98 in): Days with 25 mm or more rain	34	3	1917	2
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1927	1
10 cm (3.9 in): Days with 10 cm or more snowfall	66	7	1964	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1894	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1936	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Missoula 6 NW WFO 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Missoula 6 NW WFO Threshold Days by Year (USC00245740)

Key Facts for Missoula 6 NW WFO Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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