Butte Bert Mooney AP Threshold Days by Year (USW00024135)

16 fixed thresholds counted per year at Butte Bert Mooney AP (USW00024135): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Butte Bert Mooney AP Thresholds

Butte Bert Mooney AP: days with a maximum temperature at or below 0 C (32 F) in 127 years, most in 1975 with 109.
Butte Bert Mooney AP: nights with a minimum temperature at or below 0 C (32 F) in 127 years, most in 1975 with 253.
Butte Bert Mooney AP: nights with a minimum temperature at or below -10 C (14 F) in 127 years, most in 1985 with 127.
Butte Bert Mooney AP: days with 10 mm (0.39 in) or more of precipitation in 127 years, most in 1909 with 19.
16 fixed thresholds have at least one qualifying day at Butte Bert Mooney AP.

Days at or above 30 C (86 F)

124 years with a qualifying day

Days per year at Butte Bert Mooney AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 46 in 2021.

Days at or above 30 C (86 F) per year at Butte Bert Mooney AP
Year	Days	Decade average
1895	3	9
1896	10	9
1897	14	9
1900	13	8.9
1901	12	8.9
1903	3	8.9
1904	3	8.9
1905	8	8.9
1906	12	8.9
1907	1	8.9
1908	16	8.9
1909	12	8.9
1910	10	13.6
1911	5	13.6
1912	6	13.6
1913	12	13.6
1914	15	13.6
1915	11	13.6
1916	8	13.6
1917	17	13.6
1918	15	13.6
1919	37	13.6
1920	28	18.1
1921	19	18.1
1922	19	18.1
1923	14	18.1
1924	18	18.1
1925	15	18.1
1926	20	18.1
1927	11	18.1
1928	17	18.1
1929	20	18.1
1930	22	20.5
1932	19	20.5
1933	26	20.5
1934	29	20.5
1935	16	20.5
1936	26	20.5
1937	20	20.5
1938	6	20.5
1941	12	12.6
1942	15	12.6
1943	9	12.6
1945	19	12.6
1946	13	12.6
1947	11	12.6
1948	8	12.6
1949	14	12.6
1950	5	12.6
1951	15	12.6
1952	9	12.6
1953	19	12.6
1954	18	12.6
1955	19	12.6
1956	8	12.6
1957	11	12.6
1958	9	12.6
1959	13	12.6
1960	17	16.2
1961	24	16.2
1962	2	16.2
1963	19	16.2
1964	18	16.2
1965	7	16.2
1966	25	16.2
1967	20	16.2
1968	10	16.2
1969	20	16.2
1970	29	18.8
1971	35	18.8
1972	13	18.8
1973	23	18.8
1974	27	18.8
1975	3	18.8
1976	12	18.8
1977	10	18.8
1978	14	18.8
1979	22	18.8
1980	8	19.7
1981	34	19.7
1982	17	19.7
1983	20	19.7
1984	19	19.7
1985	26	19.7
1986	12	19.7
1987	12	19.7
1988	33	19.7
1989	16	19.7
1990	22	19.6
1991	25	19.6
1992	12	19.6
1993	1	19.6
1994	26	19.6
1995	15	19.6
1996	27	19.6
1997	10	19.6
1998	35	19.6
1999	23	19.6
2000	34	21.8
2001	21	21.8
2002	12	21.8
2003	33	21.8
2004	10	21.8
2005	21	21.8
2006	27	21.8
2007	35	21.8
2008	18	21.8
2009	7	21.8
2010	10	23.6
2011	18	23.6
2012	30	23.6
2013	27	23.6
2015	22	23.6
2016	18	23.6
2017	36	23.6
2018	29	23.6
2019	22	23.6
2020	22	29.4
2021	46	29.4
2022	42	29.4
2023	15	29.4
2024	31	29.4
2025	20	29.4
2026	30	29.4

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

First to last qualifying date each year at Butte Bert Mooney AP
Year	First date	Last date
1895	1895-07-02	1895-08-12
1896	1896-07-04	1896-08-29
1897	1897-07-11	1897-08-24
1900	1900-06-20	1900-08-01
1901	1901-07-06	1901-07-31
1903	1903-07-20	1903-08-19
1904	1904-08-13	1904-09-08
1905	1905-07-09	1905-08-24
1906	1906-07-05	1906-08-17
1907	1907-08-07	1907-08-07
1908	1908-07-03	1908-09-05
1909	1909-06-30	1909-08-30
1910	1910-06-26	1910-08-19
1911	1911-06-12	1911-08-18
1912	1912-06-24	1912-08-26
1913	1913-07-06	1913-08-28
1914	1914-06-01	1914-08-15
1915	1915-07-21	1915-08-30
1916	1916-07-05	1916-08-01
1917	1917-06-28	1917-08-17
1918	1918-06-09	1918-08-25
1919	1919-05-28	1919-09-11
1920	1920-07-03	1920-08-24
1921	1921-06-14	1921-08-30
1922	1922-06-20	1922-08-28
1923	1923-07-11	1923-08-18
1924	1924-06-30	1924-09-04
1925	1925-06-19	1925-08-20
1926	1926-06-26	1926-08-26
1927	1927-06-25	1927-07-24
1928	1928-07-11	1928-08-11
1929	1929-06-28	1929-08-31
1930	1930-06-10	1930-08-24
1932	1932-06-22	1932-08-20
1933	1933-06-14	1933-08-17
1934	1934-05-28	1934-09-06
1935	1935-06-22	1935-08-22
1936	1936-05-14	1936-08-16
1937	1937-06-21	1937-08-27
1938	1938-07-14	1938-08-11
1941	1941-06-22	1941-08-08
1942	1942-07-03	1942-08-23
1943	1943-07-19	1943-08-01
1945	1945-06-21	1945-09-03
1946	1946-07-11	1946-08-22
1947	1947-07-02	1947-09-02
1948	1948-06-29	1948-09-14
1949	1949-06-10	1949-08-22
1950	1950-08-30	1950-09-04
1951	1951-07-13	1951-08-03
1952	1952-07-04	1952-08-24
1953	1953-07-08	1953-08-20
1954	1954-06-22	1954-08-30
1955	1955-06-21	1955-09-07
1956	1956-07-09	1956-09-19
1957	1957-07-09	1957-08-20
1958	1958-07-22	1958-09-07
1959	1959-06-13	1959-08-17
1960	1960-07-14	1960-08-21
1961	1961-06-16	1961-08-24
1962	1962-06-25	1962-08-12
1963	1963-07-02	1963-09-07
1964	1964-07-08	1964-08-18
1965	1965-07-15	1965-08-10
1966	1966-06-28	1966-09-10
1967	1967-07-12	1967-09-05
1968	1968-07-06	1968-08-07
1969	1969-06-04	1969-09-02
1970	1970-06-21	1970-08-28
1971	1971-06-22	1971-09-10
1972	1972-07-08	1972-08-28
1973	1973-06-22	1973-08-20
1974	1974-06-13	1974-08-05
1975	1975-07-06	1975-08-06
1976	1976-06-30	1976-09-05
1977	1977-06-01	1977-08-23
1978	1978-06-23	1978-09-03
1979	1979-06-12	1979-09-08
1980	1980-07-21	1980-09-06
1981	1981-06-25	1981-09-18
1982	1982-06-30	1982-08-27
1983	1983-07-07	1983-09-01
1984	1984-05-29	1984-08-22
1985	1985-06-07	1985-08-27
1986	1986-05-27	1986-08-28
1987	1987-06-14	1987-09-23
1988	1988-06-04	1988-09-06
1989	1989-06-30	1989-07-31
1990	1990-06-24	1990-09-14
1991	1991-07-03	1991-08-31
1992	1992-06-23	1992-08-19
1993	1993-07-29	1993-07-29
1994	1994-06-20	1994-09-08
1995	1995-07-07	1995-09-03
1996	1996-06-07	1996-09-04
1997	1997-07-14	1997-08-26
1998	1998-07-09	1998-09-16
1999	1999-07-06	1999-08-30
2000	2000-06-07	2000-09-15
2001	2001-06-22	2001-09-25
2002	2002-06-25	2002-07-24
2003	2003-05-28	2003-08-26
2004	2004-07-13	2004-08-15
2005	2005-06-21	2005-08-29
2006	2006-06-28	2006-09-04
2007	2007-06-22	2007-09-03
2008	2008-06-29	2008-08-25
2009	2009-07-18	2009-09-19
2010	2010-06-29	2010-08-26
2011	2011-06-28	2011-08-28
2012	2012-06-04	2012-08-31
2013	2013-06-18	2013-09-06
2015	2015-06-08	2015-08-29
2016	2016-06-05	2016-08-31
2017	2017-06-08	2017-09-06
2018	2018-06-09	2018-08-17
2019	2019-07-11	2019-09-05
2020	2020-05-30	2020-09-05
2021	2021-06-02	2021-09-08
2022	2022-06-17	2022-09-07
2023	2023-07-16	2023-08-29
2024	2024-06-23	2024-09-06
2025	2025-05-31	2025-09-03
2026	2026-07-05	2026-08-27

Every Fixed Threshold

Fixed thresholds at Butte Bert Mooney AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	124	46	2021	30
35 C (95 F): Days	32	7	2000	2
90 F (32.2 C): Days	113	23	1919	9
0 C (32 F): Ice days (max	127	109	1975	13
0 C (32 F): Frost days (min	127	253	1975	138
-10 C (14 F): Days with min	127	127	1985	24
-20 C (-4 F): Days with min	126	61	1985	3
-30 C (-22 F): Days with min	97	21	1949	4
-40 C (-40 F): Days with min	20	4	1933	1
20 C (68 F): Tropical nights (min	7	1	1897	1
10 mm (0.39 in): Days with 10 mm or more rain	127	19	1909	7
25 mm (0.98 in): Days with 25 mm or more rain	58	3	1908	2
50 mm (1.97 in): Days with 50 mm or more rain	4	2	1913	1
10 cm (3.9 in): Days with 10 cm or more snowfall	90	10	1917	2
25 cm (9.8 in): Days with 25 cm or more snowfall	16	2	1899	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	1	1911	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

Data for Butte Bert Mooney AP 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).

Butte Bert Mooney AP Threshold Days by Year (USW00024135)

Key Facts for Butte Bert Mooney AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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