Mather 3 NW Threshold Days by Year (USC00475164)

19 fixed thresholds counted per year at Mather 3 NW (USC00475164): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mather 3 NW Thresholds

Mather 3 NW: days with 10 mm (0.39 in) or more of precipitation in 117 years, most in 1965 with 42.
Mather 3 NW: days with a maximum temperature at or above 30 C (86 F) in 116 years, most in 1921 with 54.
Mather 3 NW: days with a maximum temperature at or below 0 C (32 F) in 116 years, most in 1978 with 99.
Mather 3 NW: days with 25 mm (0.98 in) or more of precipitation in 116 years, most in 1959 with 15.
19 fixed thresholds have at least one qualifying day at Mather 3 NW.

Days at or above 30 C (86 F)

116 years with a qualifying day

Days per year at Mather 3 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 54 in 1921.

Days at or above 30 C (86 F) per year at Mather 3 NW
Year	Days	Decade average
1904	8	19.7
1905	14	19.7
1906	23	19.7
1907	6	19.7
1908	31	19.7
1909	36	19.7
1912	20	19.6
1913	28	19.6
1914	14	19.6
1915	1	19.6
1916	29	19.6
1917	10	19.6
1919	35	19.6
1920	20	25.1
1921	54	25.1
1922	28	25.1
1923	40	25.1
1924	8	25.1
1925	29	25.1
1926	18	25.1
1927	22	25.1
1928	11	25.1
1929	21	25.1
1930	40	40.9
1931	46	40.9
1932	29	40.9
1933	47	40.9
1934	41	40.9
1935	32	40.9
1936	52	40.9
1937	52	40.9
1938	21	40.9
1939	49	40.9
1940	27	28.1
1941	34	28.1
1942	11	28.1
1943	30	28.1
1944	29	28.1
1946	18	28.1
1947	33	28.1
1948	41	28.1
1949	30	28.1
1950	9	19.9
1951	5	19.9
1952	28	19.9
1953	22	19.9
1954	20	19.9
1955	44	19.9
1956	18	19.9
1957	15	19.9
1958	15	19.9
1959	23	19.9
1960	19	25.7
1961	26	25.7
1963	37	25.7
1964	38	25.7
1965	13	25.7
1966	29	25.7
1967	16	25.7
1968	25	25.7
1969	28	25.7
1970	39	26.4
1971	20	26.4
1973	21	26.4
1975	28	26.4
1976	44	26.4
1977	33	26.4
1978	20	26.4
1979	6	26.4
1980	21	23.3
1981	9	23.3
1982	8	23.3
1983	36	23.3
1984	14	23.3
1985	21	23.3
1986	15	23.3
1987	34	23.3
1988	49	23.3
1989	26	23.3
1990	14	15.4
1991	31	15.4
1992	7	15.4
1993	5	15.4
1994	7	15.4
1995	27	15.4
1996	13	15.4
1997	13	15.4
1998	15	15.4
1999	22	15.4
2000	2	15.6
2001	27	15.6
2002	24	15.6
2003	20	15.6
2004	4	15.6
2005	25	15.6
2006	23	15.6
2007	23	15.6
2008	4	15.6
2009	4	15.6
2010	19	21.4
2011	28	21.4
2012	52	21.4
2013	25	21.4
2014	7	21.4
2015	13	21.4
2016	17	21.4
2017	15	21.4
2018	26	21.4
2019	12	21.4
2020	30	26.7
2021	31	26.7
2022	25	26.7
2023	37	26.7
2024	18	26.7
2025	25	26.7
2026	21	26.7

For each year, a bar from the first to the last day at Mather 3 NW meeting 30 C (86 F).

First to last qualifying date each year at Mather 3 NW
Year	First date	Last date
1904	1904-06-23	1904-09-28
1905	1905-06-06	1905-08-29
1906	1906-05-17	1906-09-17
1907	1907-06-16	1907-08-31
1908	1908-06-06	1908-09-26
1909	1909-05-06	1909-08-28
1912	1912-06-22	1912-09-09
1913	1913-06-15	1913-09-07
1914	1914-05-26	1914-08-17
1915	1915-07-15	1915-07-15
1916	1916-07-01	1916-09-06
1917	1917-07-21	1917-08-19
1919	1919-05-29	1919-09-21
1920	1920-06-09	1920-09-26
1921	1921-05-21	1921-09-10
1922	1922-05-11	1922-10-03
1923	1923-06-02	1923-09-27
1924	1924-07-16	1924-08-31
1925	1925-05-21	1925-09-20
1926	1926-05-02	1926-09-18
1927	1927-05-22	1927-09-16
1928	1928-05-10	1928-08-28
1929	1929-05-29	1929-09-04
1930	1930-04-11	1930-10-11
1931	1931-06-04	1931-09-21
1932	1932-05-15	1932-09-20
1933	1933-06-03	1933-09-10
1934	1934-05-07	1934-08-19
1935	1935-07-03	1935-09-26
1936	1936-05-09	1936-09-23
1937	1937-05-30	1937-09-24
1938	1938-06-22	1938-08-22
1939	1939-04-25	1939-09-16
1940	1940-05-13	1940-09-21
1941	1941-05-27	1941-09-22
1942	1942-07-11	1942-09-01
1943	1943-06-04	1943-09-01
1944	1944-05-14	1944-09-17
1946	1946-05-27	1946-08-16
1947	1947-06-09	1947-10-21
1948	1948-05-21	1948-09-20
1949	1949-05-04	1949-08-27
1950	1950-05-25	1950-08-24
1951	1951-07-24	1951-07-30
1952	1952-04-29	1952-09-14
1953	1953-05-09	1953-10-03
1954	1954-06-12	1954-09-07
1955	1955-05-04	1955-09-19
1956	1956-05-13	1956-08-16
1957	1957-05-02	1957-09-02
1958	1958-06-29	1958-08-29
1959	1959-05-03	1959-09-09
1960	1960-07-13	1960-09-08
1961	1961-05-14	1961-09-11
1963	1963-06-03	1963-10-07
1964	1964-05-19	1964-08-28
1965	1965-05-03	1965-08-15
1966	1966-05-27	1966-09-02
1967	1967-05-19	1967-08-26
1968	1968-05-16	1968-09-04
1969	1969-05-28	1969-08-31
1970	1970-04-28	1970-09-06
1971	1971-06-05	1971-09-08
1973	1973-06-10	1973-09-02
1975	1975-05-19	1975-08-13
1976	1976-06-07	1976-10-02
1977	1977-04-28	1977-08-28
1978	1978-05-26	1978-09-12
1979	1979-06-16	1979-09-01
1980	1980-04-22	1980-09-09
1981	1981-06-06	1981-09-11
1982	1982-07-05	1982-08-19
1983	1983-06-22	1983-09-10
1984	1984-07-13	1984-08-30
1985	1985-04-21	1985-09-20
1986	1986-05-31	1986-08-17
1987	1987-04-21	1987-09-06
1988	1988-05-22	1988-08-18
1989	1989-06-20	1989-08-23
1990	1990-04-25	1990-09-07
1991	1991-04-07	1991-09-10
1992	1992-05-02	1992-08-25
1993	1993-08-12	1993-08-27
1994	1994-06-15	1994-08-26
1995	1995-06-18	1995-08-31
1996	1996-05-19	1996-09-11
1997	1997-06-23	1997-08-28
1998	1998-05-18	1998-09-14
1999	1999-06-06	1999-09-05
2000	2000-06-09	2000-09-01
2001	2001-05-16	2001-08-13
2002	2002-04-16	2002-09-10
2003	2003-06-25	2003-09-12
2004	2004-06-08	2004-09-03
2005	2005-06-08	2005-09-12
2006	2006-05-29	2006-08-05
2007	2007-04-30	2007-09-06
2008	2008-07-16	2008-09-03
2009	2009-06-24	2009-08-15
2010	2010-05-24	2010-08-31
2011	2011-05-31	2011-09-02
2012	2012-05-19	2012-09-12
2013	2013-05-15	2013-09-11
2014	2014-05-31	2014-08-26
2015	2015-06-10	2015-09-07
2016	2016-05-07	2016-08-19
2017	2017-06-04	2017-09-26
2018	2018-05-25	2018-09-18
2019	2019-06-01	2019-08-05
2020	2020-06-03	2020-08-29
2021	2021-05-02	2021-10-01
2022	2022-05-13	2022-09-02
2023	2023-04-13	2023-10-02
2024	2024-05-19	2024-09-16
2025	2025-05-16	2025-10-04
2026	2026-05-27	2026-09-05

Every Fixed Threshold

Fixed thresholds at Mather 3 NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	116	54	1921	21
35 C (95 F): Days	56	19	1936	2
40 C (104 F): Days	3	3	1936	1
90 F (32.2 C): Days	108	38	1988	9
100 F (37.8 C): Days	12	8	1936	3
0 C (32 F): Ice days (max	116	99	1978	42
0 C (32 F): Frost days (min	111	204	1917	90
-10 C (14 F): Days with min	111	101	1937	42
-20 C (-4 F): Days with min	111	52	1917	16
-30 C (-22 F): Days with min	72	14	1912	3
-40 C (-40 F): Days with min	1	1	1951	1
20 C (68 F): Tropical nights (min	103	15	1995	9
25 C (77 F): Days with min	1	1	1995	1
10 mm (0.39 in): Days with 10 mm or more rain	117	42	1965	19
25 mm (0.98 in): Days with 25 mm or more rain	116	15	1959	8
50 mm (1.97 in): Days with 50 mm or more rain	81	4	1947	2
100 mm (3.94 in): Days with 100 mm or more rain	8	1	1926	1
10 cm (3.9 in): Days with 10 cm or more snowfall	88	10	1929	2
25 cm (9.8 in): Days with 25 cm or more snowfall	20	2	1959	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Mather 3 NW 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).

Mather 3 NW Threshold Days by Year (USC00475164)

Key Facts for Mather 3 NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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