Koolunga Threshold Days by Year

4 fixed thresholds counted per year at Koolunga (ASN00021029): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Koolunga Thresholds

Koolunga: days with 10 mm (0.39 in) or more of precipitation in 138 years, most in 1917 with 21.
Koolunga: days with 25 mm (0.98 in) or more of precipitation in 94 years, most in 1890 with 6.
Koolunga: days with 50 mm (1.97 in) or more of precipitation in 14 years, most in 1973 with 2.
Koolunga: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1889 with 1.
4 fixed thresholds have at least one qualifying day at Koolunga.

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

138 years with a qualifying day

Days per year at Koolunga with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1917.

Days with 10 mm (0.39 in) or more of precipitation per year at Koolunga
Year	Days	Decade average
1885	7	7.8
1886	4	7.8
1887	9	7.8
1888	4	7.8
1889	15	7.8
1890	17	6.8
1891	3	6.8
1892	5	6.8
1893	8	6.8
1894	7	6.8
1895	5	6.8
1896	2	6.8
1897	6	6.8
1898	10	6.8
1899	5	6.8
1900	8	9.4
1901	7	9.4
1902	4	9.4
1903	13	9.4
1904	9	9.4
1905	9	9.4
1906	8	9.4
1907	14	9.4
1908	10	9.4
1909	12	9.4
1910	18	10.7
1911	12	10.7
1912	8	10.7
1913	7	10.7
1914	4	10.7
1915	4	10.7
1916	13	10.7
1917	21	10.7
1919	9	10.7
1920	12	8
1921	9	8
1922	6	8
1923	10	8
1925	8	8
1926	11	8
1927	5	8
1928	3	8
1930	5	6.4
1931	6	6.4
1932	10	6.4
1933	12	6.4
1934	4	6.4
1935	4	6.4
1936	5	6.4
1937	7	6.4
1938	3	6.4
1939	8	6.4
1940	5	8.2
1941	10	8.2
1942	11	8.2
1943	5	8.2
1944	6	8.2
1945	12	8.2
1946	10	8.2
1947	10	8.2
1948	4	8.2
1949	9	8.2
1950	9	7.8
1951	8	7.8
1952	9	7.8
1953	10	7.8
1954	10	7.8
1955	10	7.8
1957	2	7.8
1958	9	7.8
1959	3	7.8
1960	9	7.8
1961	7	7.8
1962	4	7.8
1963	9	7.8
1964	7	7.8
1965	4	7.8
1966	9	7.8
1967	3	7.8
1968	12	7.8
1969	14	7.8
1970	11	11
1971	12	11
1972	6	11
1973	15	11
1974	15	11
1975	12	11
1976	7	11
1977	5	11
1978	13	11
1979	14	11
1980	10	10
1981	9	10
1982	3	10
1983	10	10
1984	8	10
1985	9	10
1986	14	10
1987	14	10
1988	10	10
1989	13	10
1990	11	12.1
1991	16	12.1
1992	19	12.1
1993	14	12.1
1994	7	12.1
1995	8	12.1
1996	12	12.1
1997	12	12.1
1998	11	12.1
1999	11	12.1
2000	14	9.7
2001	10	9.7
2002	6	9.7
2003	9	9.7
2004	9	9.7
2005	9	9.7
2006	8	9.7
2007	12	9.7
2008	6	9.7
2009	14	9.7
2010	15	10.2
2011	12	10.2
2012	9	10.2
2013	8	10.2
2014	11	10.2
2015	12	10.2
2016	19	10.2
2017	6	10.2
2018	4	10.2
2019	6	10.2
2020	12	9
2021	9	9
2022	14	9
2023	10	9
2024	3	9
2025	7	9
2026	8	9

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

First to last qualifying date each year at Koolunga
Year	First date	Last date
1885	1885-02-28	1885-12-23
1886	1886-07-06	1886-11-25
1887	1887-06-21	1887-12-02
1888	1888-01-24	1888-08-31
1889	1889-01-02	1889-11-15
1890	1890-01-28	1890-11-14
1891	1891-03-29	1891-12-12
1892	1892-01-23	1892-10-25
1893	1893-04-01	1893-10-14
1894	1894-03-20	1894-12-27
1895	1895-01-04	1895-12-10
1896	1896-01-24	1896-06-04
1897	1897-01-09	1897-08-31
1898	1898-02-09	1898-08-30
1899	1899-02-26	1899-09-10
1900	1900-04-15	1900-11-17
1901	1901-02-26	1901-10-28
1902	1902-03-26	1902-12-17
1903	1903-02-15	1903-12-11
1904	1904-01-03	1904-12-17
1905	1905-01-03	1905-10-22
1906	1906-03-25	1906-12-18
1907	1907-04-05	1907-12-27
1908	1908-01-31	1908-10-16
1909	1909-05-06	1909-11-09
1910	1910-03-05	1910-10-18
1911	1911-02-28	1911-12-01
1912	1912-06-10	1912-11-15
1913	1913-03-04	1913-12-23
1914	1914-03-13	1914-12-15
1915	1915-05-13	1915-10-22
1916	1916-01-04	1916-11-24
1917	1917-01-22	1917-12-12
1919	1919-02-16	1919-12-27
1920	1920-03-07	1920-12-27
1921	1921-03-02	1921-11-05
1922	1922-04-26	1922-12-09
1923	1923-05-10	1923-12-27
1925	1925-01-13	1925-10-13
1926	1926-02-25	1926-10-12
1927	1927-03-22	1927-11-01
1928	1928-02-01	1928-09-30
1930	1930-04-24	1930-10-24
1931	1931-03-13	1931-09-11
1932	1932-02-05	1932-10-25
1933	1933-05-13	1933-12-14
1934	1934-08-15	1934-10-01
1935	1935-01-03	1935-10-19
1936	1936-02-18	1936-10-08
1937	1937-01-19	1937-11-30
1938	1938-04-26	1938-07-28
1939	1939-02-24	1939-11-03
1940	1940-01-05	1940-12-20
1941	1941-01-24	1941-11-19
1942	1942-01-20	1942-12-25
1943	1943-02-17	1943-10-16
1944	1944-04-08	1944-12-21
1945	1945-01-10	1945-12-27
1946	1946-01-17	1946-12-25
1947	1947-02-10	1947-12-03
1948	1948-04-11	1948-11-06
1949	1949-02-20	1949-11-21
1950	1950-02-02	1950-12-20
1951	1951-05-13	1951-10-09
1952	1952-01-25	1952-11-27
1953	1953-06-10	1953-11-05
1954	1954-01-26	1954-12-03
1955	1955-02-15	1955-11-24
1957	1957-07-05	1957-10-23
1958	1958-03-07	1958-09-11
1959	1959-07-22	1959-09-19
1960	1960-05-05	1960-11-12
1961	1961-02-08	1961-12-14
1962	1962-03-27	1962-10-19
1963	1963-05-15	1963-11-07
1964	1964-01-09	1964-12-23
1965	1965-05-08	1965-08-15
1966	1966-02-13	1966-12-04
1967	1967-02-24	1967-09-05
1968	1968-01-19	1968-11-06
1969	1969-01-14	1969-11-05
1970	1970-01-01	1970-12-05
1971	1971-03-15	1971-12-10
1972	1972-01-07	1972-08-29
1973	1973-02-04	1973-11-04
1974	1974-01-28	1974-10-24
1975	1975-01-08	1975-12-14
1976	1976-03-01	1976-11-03
1977	1977-01-15	1977-11-29
1978	1978-04-10	1978-11-19
1979	1979-01-17	1979-12-13
1980	1980-01-01	1980-10-23
1981	1981-01-10	1981-11-10
1982	1982-03-08	1982-04-27
1983	1983-03-04	1983-10-15
1984	1984-05-22	1984-11-01
1985	1985-03-16	1985-12-10
1986	1986-06-14	1986-12-07
1987	1987-01-21	1987-12-01
1988	1988-04-21	1988-12-05
1989	1989-03-10	1989-11-28
1990	1990-05-17	1990-12-07
1991	1991-01-23	1991-11-06
1992	1992-03-01	1992-12-25
1993	1993-01-24	1993-12-21
1994	1994-06-05	1994-09-04
1995	1995-01-14	1995-10-22
1996	1996-01-25	1996-10-17
1997	1997-01-22	1997-12-18
1998	1998-02-07	1998-12-13
1999	1999-01-08	1999-12-26
2000	2000-02-21	2000-12-22
2001	2001-02-13	2001-11-23
2002	2002-05-19	2002-12-31
2003	2003-02-20	2003-12-20
2004	2004-05-18	2004-12-09
2005	2005-01-04	2005-11-07
2006	2006-02-24	2006-12-22
2007	2007-01-19	2007-12-22
2008	2008-01-19	2008-12-12
2009	2009-03-04	2009-12-08
2010	2010-01-13	2010-12-08
2011	2011-02-05	2011-12-18
2012	2012-01-08	2012-07-10
2013	2013-02-28	2013-07-18
2014	2014-02-15	2014-11-21
2015	2015-01-09	2015-11-05
2016	2016-01-22	2016-12-29
2017	2017-01-14	2017-12-01
2018	2018-05-04	2018-08-03
2019	2019-05-10	2019-09-21
2020	2020-01-20	2020-12-06
2021	2021-01-26	2021-11-12
2022	2022-01-23	2022-11-19
2023	2023-04-15	2023-12-12
2024	2024-08-16	2024-11-12
2025	2025-07-10	2025-11-29
2026	2026-03-02	2026-08-10

Every Fixed Threshold

Fixed thresholds at Koolunga
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	138	21	1917	8
25 mm (0.98 in): Days with 25 mm or more rain	94	6	1890	1
50 mm (1.97 in): Days with 50 mm or more rain	14	2	1973	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1889	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1885.

Download the Data

Data for Koolunga 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Koolunga Threshold Days by Year

Key Facts for Koolunga Thresholds

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

Every Fixed Threshold

Download the Data

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