Mundaring Weir Threshold Days by Year

4 fixed thresholds counted per year at Mundaring Weir (ASN00009031): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mundaring Weir Thresholds

Mundaring Weir: days with 10 mm (0.39 in) or more of precipitation in 108 years, most in 1926 with 62.
Mundaring Weir: days with 25 mm (0.98 in) or more of precipitation in 108 years, most in 1946 with 24.
Mundaring Weir: days with 50 mm (1.97 in) or more of precipitation in 70 years, most in 1967 with 7.
Mundaring Weir: days with 100 mm (3.94 in) or more of precipitation in 5 years, most in 1920 with 1.
4 fixed thresholds have at least one qualifying day at Mundaring Weir.

Days with 10 mm (0.39 in) or more of precipitation

108 years with a qualifying day

Days per year at Mundaring Weir with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 62 in 1926.

Days with 10 mm (0.39 in) or more of precipitation per year at Mundaring Weir
Year	Days	Decade average
1907	41	37.7
1908	33	37.7
1909	39	37.7
1910	35	36.7
1911	25	36.7
1912	34	36.7
1913	34	36.7
1914	20	36.7
1915	58	36.7
1916	35	36.7
1917	54	36.7
1918	44	36.7
1919	28	36.7
1920	41	42
1921	42	42
1922	30	42
1923	52	42
1924	43	42
1925	31	42
1926	62	42
1927	44	42
1928	45	42
1929	30	42
1930	39	37.2
1931	45	37.2
1932	43	37.2
1933	31	37.2
1934	39	37.2
1935	34	37.2
1936	31	37.2
1937	32	37.2
1938	35	37.2
1939	43	37.2
1940	24	37.1
1941	36	37.1
1942	53	37.1
1943	31	37.1
1944	25	37.1
1945	44	37.1
1946	52	37.1
1947	33	37.1
1948	40	37.1
1949	33	37.1
1950	31	36.1
1951	37	36.1
1952	36	36.1
1953	40	36.1
1954	32	36.1
1955	50	36.1
1956	41	36.1
1957	36	36.1
1958	33	36.1
1959	25	36.1
1960	36	36.3
1961	41	36.3
1962	32	36.3
1963	52	36.3
1964	42	36.3
1965	43	36.3
1966	29	36.3
1967	34	36.3
1968	35	36.3
1969	19	36.3
1970	37	33.2
1971	40	33.2
1972	27	33.2
1973	45	33.2
1974	45	33.2
1975	30	33.2
1976	25	33.2
1977	23	33.2
1978	35	33.2
1979	25	33.2
1980	29	31.6
1981	40	31.6
1982	28	31.6
1983	34	31.6
1984	36	31.6
1985	37	31.6
1986	36	31.6
1987	23	31.6
1989	21	31.6
1990	31	33.5
1991	45	33.5
1992	36	33.5
1993	32	33.5
1994	21	33.5
1995	34	33.5
1996	41	33.5
1997	28	33.5
1998	27	33.5
1999	40	33.5
2000	33	28
2001	21	28
2002	23	28
2003	34	28
2004	28	28
2005	29	28
2006	21	28
2007	35	28
2008	26	28
2009	30	28
2010	16	28.3
2011	42	28.3
2012	24	28.3
2013	35	28.3
2014	31	28.3
2015	22	28.3

For each year, a bar from the first to the last day at Mundaring Weir meeting 10 mm (0.39 in).

First to last qualifying date each year at Mundaring Weir
Year	First date	Last date
1907	1907-03-27	1907-10-25
1908	1908-02-26	1908-11-25
1909	1909-01-06	1909-11-07
1910	1910-04-15	1910-10-16
1911	1911-04-23	1911-10-19
1912	1912-05-05	1912-11-12
1913	1913-05-14	1913-12-20
1914	1914-02-18	1914-11-13
1915	1915-01-04	1915-10-21
1916	1916-01-29	1916-11-24
1917	1917-02-10	1917-12-20
1918	1918-01-19	1918-10-29
1919	1919-04-04	1919-12-10
1920	1920-03-29	1920-10-10
1921	1921-03-22	1921-11-13
1922	1922-02-23	1922-12-15
1923	1923-01-20	1923-12-16
1924	1924-05-04	1924-11-10
1925	1925-01-24	1925-10-12
1926	1926-02-24	1926-11-19
1927	1927-01-10	1927-10-29
1928	1928-04-20	1928-12-21
1929	1929-01-02	1929-11-11
1930	1930-04-15	1930-11-03
1931	1931-04-12	1931-10-07
1932	1932-04-05	1932-10-29
1933	1933-04-10	1933-10-19
1934	1934-03-08	1934-11-06
1935	1935-04-03	1935-10-27
1936	1936-04-15	1936-10-01
1937	1937-02-11	1937-10-22
1938	1938-03-14	1938-11-02
1939	1939-01-20	1939-10-05
1940	1940-01-23	1940-12-06
1941	1941-04-22	1941-11-17
1942	1942-03-01	1942-12-21
1943	1943-01-31	1943-10-21
1944	1944-04-30	1944-12-07
1945	1945-03-26	1945-12-25
1946	1946-02-05	1946-11-15
1947	1947-04-17	1947-10-25
1948	1948-03-30	1948-12-24
1949	1949-03-12	1949-11-14
1950	1950-05-05	1950-11-08
1951	1951-02-14	1951-12-07
1952	1952-03-29	1952-12-18
1953	1953-02-02	1953-11-16
1954	1954-01-15	1954-11-11
1955	1955-02-15	1955-10-27
1956	1956-03-05	1956-12-03
1957	1957-01-20	1957-10-20
1958	1958-05-08	1958-12-21
1959	1959-03-01	1959-10-27
1960	1960-01-01	1960-10-15
1961	1961-03-28	1961-12-16
1962	1962-01-01	1962-11-09
1963	1963-03-16	1963-10-31
1964	1964-04-02	1964-12-19
1965	1965-05-01	1965-11-08
1966	1966-04-12	1966-10-23
1967	1967-04-22	1967-12-10
1968	1968-02-03	1968-10-15
1969	1969-03-19	1969-08-25
1970	1970-02-07	1970-11-04
1971	1971-01-31	1971-10-20
1972	1972-04-20	1972-10-28
1973	1973-01-10	1973-10-17
1974	1974-04-03	1974-11-14
1975	1975-03-22	1975-10-18
1976	1976-01-07	1976-11-28
1977	1977-05-11	1977-10-30
1978	1978-02-24	1978-11-25
1979	1979-03-15	1979-11-17
1980	1980-02-11	1980-10-22
1981	1981-02-18	1981-11-26
1982	1982-01-21	1982-10-05
1983	1983-04-01	1983-12-31
1984	1984-03-05	1984-12-28
1985	1985-04-09	1985-11-09
1986	1986-02-21	1986-11-09
1987	1987-03-17	1987-12-24
1989	1989-04-24	1989-10-18
1990	1990-01-29	1990-10-29
1991	1991-02-26	1991-12-26
1992	1992-01-27	1992-11-20
1993	1993-02-06	1993-10-02
1994	1994-05-21	1994-09-30
1995	1995-02-23	1995-11-08
1996	1996-04-20	1996-12-12
1997	1997-03-30	1997-10-10
1998	1998-03-11	1998-10-17
1999	1999-01-05	1999-12-13
2000	2000-01-15	2000-09-06
2001	2001-05-07	2001-11-19
2002	2002-01-15	2002-11-01
2003	2003-03-30	2003-11-18
2004	2004-05-08	2004-11-10
2005	2005-03-28	2005-10-01
2006	2006-01-13	2006-09-12
2007	2007-01-03	2007-12-06
2008	2008-02-08	2008-11-22
2009	2009-05-21	2009-11-19
2010	2010-03-23	2010-12-21
2011	2011-01-06	2011-12-13
2012	2012-01-21	2012-12-13
2013	2013-03-11	2013-11-30
2014	2014-02-22	2014-11-27
2015	2015-02-02	2015-12-06

Every Fixed Threshold

Fixed thresholds at Mundaring Weir
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	108	62	1926	22
25 mm (0.98 in): Days with 25 mm or more rain	108	24	1946	4
50 mm (1.97 in): Days with 50 mm or more rain	70	7	1967	2
100 mm (3.94 in): Days with 100 mm or more rain	5	1	1920	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

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Data for Mundaring Weir 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).

Mundaring Weir Threshold Days by Year

Key Facts for Mundaring Weir Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

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