Butte Threshold Days by Year (USC00251365)

20 fixed thresholds counted per year at Butte (USC00251365): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Butte Thresholds

Butte: days with a maximum temperature at or above 30 C (86 F) in 105 years, most in 1939 with 102.
Butte: days with a maximum temperature at or above 90 F (32.2 C) in 105 years, most in 1931 with 83.
Butte: days with a maximum temperature at or below 0 C (32 F) in 105 years, most in 1978 with 86.
Butte: days with a maximum temperature at or above 35 C (95 F) in 104 years, most in 1934 with 53.
20 fixed thresholds have at least one qualifying day at Butte.

Days at or above 30 C (86 F)

105 years with a qualifying day

Days per year at Butte with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 102 in 1939.

Days at or above 30 C (86 F) per year at Butte
Year	Days	Decade average
1909	63	63
1910	87	61.8
1912	53	61.8
1913	84	61.8
1914	66	61.8
1915	22	61.8
1916	68	61.8
1917	54	61.8
1919	60	61.8
1920	52	59.4
1921	63	59.4
1922	68	59.4
1924	41	59.4
1925	74	59.4
1926	69	59.4
1927	63	59.4
1928	50	59.4
1929	55	59.4
1930	59	78
1931	94	78
1932	63	78
1933	71	78
1934	92	78
1935	65	78
1939	102	78
1940	74	67.8
1941	77	67.8
1942	62	67.8
1943	81	67.8
1944	60	67.8
1945	54	67.8
1946	58	67.8
1947	65	67.8
1948	75	67.8
1949	72	67.8
1950	40	63.3
1951	33	63.3
1952	78	63.3
1953	72	63.3
1954	55	63.3
1955	88	63.3
1956	91	63.3
1957	47	63.3
1958	55	63.3
1959	74	63.3
1960	52	57
1961	65	57
1962	45	57
1963	72	57
1965	48	57
1966	64	57
1967	45	57
1968	63	57
1969	59	57
1970	85	64.5
1971	70	64.5
1972	52	64.5
1973	65	64.5
1974	56	64.5
1975	65	64.5
1976	74	64.5
1977	56	64.5
1978	67	64.5
1979	55	64.5
1980	86	64.8
1981	65	64.8
1982	48	64.8
1983	83	64.8
1984	59	64.8
1985	58	64.8
1986	43	64.8
1987	70	64.8
1988	74	64.8
1989	62	64.8
1990	73	50.6
1991	74	50.6
1992	21	50.6
1993	24	50.6
1994	53	50.6
1995	66	50.6
1996	38	50.6
1997	55	50.6
1998	58	50.6
1999	44	50.6
2000	58	59.9
2001	57	59.9
2002	73	59.9
2003	69	59.9
2004	51	59.9
2005	70	59.9
2006	63	59.9
2007	62	59.9
2008	36	59.9
2010	42	44.5
2011	42	44.5
2012	84	44.5
2013	41	44.5
2014	24	44.5
2015	42	44.5
2016	47	44.5
2017	41	44.5
2018	45	44.5
2019	37	44.5
2020	65	66
2021	67	66

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

First to last qualifying date each year at Butte
Year	First date	Last date
1909	1909-05-04	1909-11-06
1910	1910-03-20	1910-10-17
1912	1912-05-17	1912-10-05
1913	1913-04-30	1913-10-13
1914	1914-05-24	1914-10-18
1915	1915-05-10	1915-09-19
1916	1916-04-10	1916-10-03
1917	1917-05-16	1917-09-23
1919	1919-06-15	1919-09-26
1920	1920-06-08	1920-10-09
1921	1921-03-18	1921-09-28
1922	1922-05-10	1922-10-27
1924	1924-04-14	1924-09-03
1925	1925-04-14	1925-09-19
1926	1926-04-15	1926-09-16
1927	1927-04-30	1927-10-26
1928	1928-05-01	1928-10-10
1929	1929-04-04	1929-10-15
1930	1930-04-04	1930-09-23
1931	1931-04-14	1931-09-21
1932	1932-05-13	1932-09-18
1933	1933-06-01	1933-10-14
1934	1934-04-21	1934-10-07
1935	1935-06-09	1935-09-24
1939	1939-03-22	1939-10-06
1940	1940-04-14	1940-10-26
1941	1941-05-13	1941-09-21
1942	1942-04-15	1942-10-07
1943	1943-03-29	1943-10-10
1944	1944-05-14	1944-09-26
1945	1945-05-25	1945-10-16
1946	1946-03-31	1946-09-25
1947	1947-06-16	1947-10-21
1948	1948-04-18	1948-10-25
1949	1949-04-25	1949-09-25
1950	1950-05-22	1950-10-30
1951	1951-04-28	1951-10-01
1952	1952-04-27	1952-09-30
1953	1953-05-09	1953-10-19
1954	1954-04-13	1954-10-08
1955	1955-04-19	1955-10-26
1956	1956-05-10	1956-10-16
1957	1957-05-07	1957-09-30
1958	1958-04-16	1958-10-19
1959	1959-04-30	1959-09-14
1960	1960-05-31	1960-10-11
1961	1961-05-10	1961-10-06
1962	1962-04-24	1962-10-14
1963	1963-04-01	1963-10-06
1965	1965-05-01	1965-09-02
1966	1966-05-04	1966-10-06
1967	1967-05-17	1967-10-03
1968	1968-03-30	1968-10-14
1969	1969-05-14	1969-09-15
1970	1970-05-17	1970-10-04
1971	1971-04-15	1971-09-14
1972	1972-04-06	1972-09-20
1973	1973-05-20	1973-09-10
1974	1974-06-03	1974-10-10
1975	1975-05-19	1975-10-04
1976	1976-05-19	1976-09-30
1977	1977-04-09	1977-09-08
1978	1978-03-30	1978-10-01
1979	1979-05-06	1979-09-11
1980	1980-04-20	1980-10-09
1981	1981-04-26	1981-09-20
1982	1982-06-28	1982-09-28
1983	1983-05-26	1983-10-27
1984	1984-05-31	1984-09-20
1985	1985-04-11	1985-09-18
1986	1986-06-15	1986-08-31
1987	1987-04-17	1987-10-04
1988	1988-04-07	1988-09-18
1989	1989-04-21	1989-10-24
1990	1990-04-22	1990-10-06
1991	1991-04-05	1991-10-16
1992	1992-04-30	1992-10-02
1993	1993-06-16	1993-10-06
1994	1994-04-18	1994-09-19
1995	1995-06-06	1995-10-11
1996	1996-05-18	1996-09-09
1997	1997-05-16	1997-10-03
1998	1998-05-14	1998-09-29
1999	1999-06-05	1999-10-10
2000	2000-05-05	2000-10-20
2001	2001-04-29	2001-10-03
2002	2002-05-29	2002-09-17
2003	2003-04-15	2003-10-23
2004	2004-04-29	2004-09-20
2005	2005-05-21	2005-10-19
2006	2006-04-14	2006-10-08
2007	2007-04-30	2007-10-07
2008	2008-06-15	2008-09-27
2010	2010-05-23	2010-10-09
2011	2011-05-09	2011-10-05
2012	2012-03-19	2012-09-17
2013	2013-05-14	2013-10-01
2014	2014-05-28	2014-09-27
2015	2015-06-09	2015-10-12
2016	2016-05-07	2016-09-24
2017	2017-05-08	2017-09-23
2018	2018-05-01	2018-10-04
2019	2019-04-21	2019-09-18
2020	2020-06-02	2020-10-07
2021	2021-04-06	2021-09-29

Every Fixed Threshold

Fixed thresholds at Butte
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	105	102	1939	67
35 C (95 F): Days	104	53	1934	18
40 C (104 F): Days	48	16	1934	2
45 C (113 F): Days	2	5	1934	1
90 F (32.2 C): Days	105	83	1931	46
100 F (37.8 C): Days	81	35	1934	4
110 F (43.3 C): Days	6	8	1934	1
0 C (32 F): Ice days (max	105	86	1978	41
0 C (32 F): Frost days (min	104	189	1909	152
-10 C (14 F): Days with min	104	88	1955	33
-20 C (-4 F): Days with min	104	44	1929	9
-30 C (-22 F): Days with min	42	7	1917	2
20 C (68 F): Tropical nights (min	104	39	1935	16
25 C (77 F): Days with min	31	14	1916	1
10 mm (0.39 in): Days with 10 mm or more rain	103	34	1993	12
25 mm (0.98 in): Days with 25 mm or more rain	103	14	1944	3
50 mm (1.97 in): Days with 50 mm or more rain	60	4	1995	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1932	1
10 cm (3.9 in): Days with 10 cm or more snowfall	80	8	1950	2
25 cm (9.8 in): Days with 25 cm or more snowfall	15	3	1953	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.

Download the Data

Data for Butte 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).

Butte Threshold Days by Year (USC00251365)

Key Facts for Butte Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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