Merino Threshold Days by Year (ASN00090057)

4 fixed thresholds counted per year at Merino (ASN00090057): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Merino Thresholds

Merino: days with 10 mm (0.39 in) or more of precipitation in 111 years, most in 1909 with 33.
Merino: days with 25 mm (0.98 in) or more of precipitation in 98 years, most in 2020 with 10.
Merino: days with 50 mm (1.97 in) or more of precipitation in 18 years, most in 1946 with 2.
Merino: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1910 with 1.
4 fixed thresholds have at least one qualifying day at Merino.

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

111 years with a qualifying day

Days per year at Merino with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 33 in 1909.

Days with 10 mm (0.39 in) or more of precipitation per year at Merino
Year	Days	Decade average
1886	24	23.5
1887	22	23.5
1888	21	23.5
1889	27	23.5
1891	12	15.7
1892	18	15.7
1899	17	15.7
1900	20	23.6
1901	23	23.6
1902	19	23.6
1903	29	23.6
1904	18	23.6
1905	26	23.6
1906	28	23.6
1907	21	23.6
1908	19	23.6
1909	33	23.6
1910	29	20.9
1911	18	20.9
1912	16	20.9
1913	18	20.9
1914	14	20.9
1915	22	20.9
1916	23	20.9
1917	26	20.9
1918	20	20.9
1919	23	20.9
1920	24	22.9
1921	23	22.9
1922	25	22.9
1923	23	22.9
1924	22	22.9
1925	12	22.9
1926	26	22.9
1927	22	22.9
1928	27	22.9
1929	25	22.9
1930	26	21.1
1932	20	21.1
1933	20	21.1
1934	22	21.1
1935	26	21.1
1936	22	21.1
1937	16	21.1
1938	14	21.1
1939	24	21.1
1940	14	20.5
1941	22	20.5
1942	30	20.5
1943	19	20.5
1944	23	20.5
1945	23	20.5
1946	25	20.5
1947	21	20.5
1948	12	20.5
1949	16	20.5
1950	13	22.4
1951	30	22.4
1952	31	22.4
1953	25	22.4
1954	13	22.4
1960	26	15.8
1961	11	15.8
1962	20	15.8
1963	12	15.8
1964	20	15.8
1965	13	15.8
1966	19	15.8
1967	7	15.8
1968	18	15.8
1969	12	15.8
1970	17	19
1971	23	19
1972	10	19
1973	26	19
1982	13	20.9
1983	22	20.9
1984	18	20.9
1985	21	20.9
1986	27	20.9
1987	14	20.9
1988	27	20.9
1989	25	20.9
1990	21	20.4
1991	23	20.4
1992	26	20.4
1993	20	20.4
1994	17	20.4
1995	25	20.4
1996	27	20.4
1997	14	20.4
1998	15	20.4
1999	16	20.4
2000	17	16.6
2002	12	16.6
2003	23	16.6
2004	22	16.6
2005	12	16.6
2006	13	16.6
2008	13	16.6
2009	21	16.6
2010	26	20.4
2011	24	20.4
2012	16	20.4
2013	15	20.4
2015	10	20.4
2016	32	20.4
2017	23	20.4
2018	24	20.4
2019	14	20.4
2020	29	29

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

First to last qualifying date each year at Merino
Year	First date	Last date
1886	1886-02-05	1886-12-19
1887	1887-01-14	1887-11-06
1888	1888-02-04	1888-12-14
1889	1889-01-02	1889-12-21
1891	1891-03-30	1891-12-16
1892	1892-03-26	1892-12-14
1899	1899-02-27	1899-12-04
1900	1900-01-22	1900-12-13
1901	1901-01-12	1901-12-23
1902	1902-03-25	1902-12-26
1903	1903-01-06	1903-11-26
1904	1904-01-04	1904-10-22
1905	1905-01-30	1905-12-04
1906	1906-02-28	1906-11-28
1907	1907-03-05	1907-12-16
1908	1908-02-08	1908-11-02
1909	1909-03-06	1909-11-22
1910	1910-03-07	1910-12-23
1911	1911-02-06	1911-12-12
1912	1912-02-24	1912-12-10
1913	1913-02-05	1913-12-23
1914	1914-03-11	1914-12-26
1915	1915-04-12	1915-11-15
1916	1916-01-28	1916-12-12
1917	1917-02-15	1917-11-26
1918	1918-01-14	1918-10-28
1919	1919-02-03	1919-12-29
1920	1920-03-08	1920-12-17
1921	1921-01-03	1921-11-28
1922	1922-04-04	1922-12-30
1923	1923-05-08	1923-12-14
1924	1924-01-12	1924-11-25
1925	1925-01-13	1925-11-20
1926	1926-02-25	1926-12-17
1927	1927-01-05	1927-12-05
1928	1928-01-20	1928-10-27
1929	1929-01-30	1929-12-28
1930	1930-02-20	1930-12-16
1932	1932-02-05	1932-11-02
1933	1933-03-04	1933-12-05
1934	1934-04-03	1934-11-30
1935	1935-01-02	1935-12-02
1936	1936-03-13	1936-12-18
1937	1937-01-19	1937-12-02
1938	1938-01-14	1938-12-01
1939	1939-02-02	1939-12-05
1940	1940-01-05	1940-12-20
1941	1941-01-24	1941-12-04
1942	1942-01-20	1942-12-19
1943	1943-02-18	1943-10-18
1944	1944-01-03	1944-12-21
1945	1945-01-31	1945-12-27
1946	1946-01-17	1946-12-28
1947	1947-02-04	1947-12-13
1948	1948-03-01	1948-11-08
1949	1949-01-14	1949-11-22
1950	1950-01-09	1950-12-20
1951	1951-01-07	1951-12-20
1952	1952-01-24	1952-12-11
1953	1953-05-19	1953-12-09
1954	1954-01-28	1954-11-20
1960	1960-01-04	1960-11-22
1961	1961-04-07	1961-11-01
1962	1962-02-14	1962-12-11
1963	1963-01-14	1963-09-12
1964	1964-01-15	1964-12-09
1965	1965-04-22	1965-12-07
1966	1966-02-14	1966-12-12
1967	1967-02-25	1967-12-30
1968	1968-03-29	1968-11-12
1969	1969-01-25	1969-12-02
1970	1970-01-02	1970-12-31
1971	1971-03-15	1971-12-31
1972	1972-01-10	1972-10-11
1973	1973-01-15	1973-12-22
1982	1982-01-07	1982-12-08
1983	1983-03-04	1983-11-09
1984	1984-03-25	1984-11-11
1985	1985-03-16	1985-12-22
1986	1986-01-16	1986-12-12
1987	1987-02-20	1987-12-02
1988	1988-01-01	1988-11-22
1989	1989-03-10	1989-12-02
1990	1990-02-02	1990-11-01
1991	1991-01-04	1991-11-04
1992	1992-02-06	1992-12-22
1993	1993-01-27	1993-12-12
1994	1994-01-08	1994-12-21
1995	1995-01-06	1995-12-04
1996	1996-01-02	1996-10-01
1997	1997-01-22	1997-11-14
1998	1998-01-13	1998-10-13
1999	1999-03-03	1999-12-03
2000	2000-02-26	2000-12-22
2002	2002-04-25	2002-12-31
2003	2003-01-30	2003-12-22
2004	2004-01-05	2004-12-11
2005	2005-01-05	2005-10-20
2006	2006-01-29	2006-09-20
2008	2008-02-20	2008-12-13
2009	2009-04-25	2009-12-18
2010	2010-01-13	2010-12-20
2011	2011-01-12	2011-12-19
2012	2012-03-04	2012-12-15
2013	2013-05-15	2013-11-08
2015	2015-01-13	2015-11-05
2016	2016-02-25	2016-12-28
2017	2017-01-14	2017-12-30
2018	2018-03-24	2018-12-16
2019	2019-02-09	2019-11-08
2020	2020-02-01	2020-12-22

Every Fixed Threshold

Fixed thresholds at Merino
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	111	33	1909	29
25 mm (0.98 in): Days with 25 mm or more rain	98	10	2020	10
50 mm (1.97 in): Days with 50 mm or more rain	18	2	1946	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1910	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1886.

Download the Data

Data for Merino 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).

Merino Threshold Days by Year (ASN00090057)

Key Facts for Merino Thresholds

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

Every Fixed Threshold

Download the Data

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