Perillup Threshold Days by Year

4 fixed thresholds counted per year at Perillup (ASN00009595): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Perillup Thresholds

Perillup: days with 10 mm (0.39 in) or more of precipitation in 88 years, most in 1955 with 36.
Perillup: days with 25 mm (0.98 in) or more of precipitation in 80 years, most in 1934 with 6.
Perillup: days with 50 mm (1.97 in) or more of precipitation in 20 years, most in 1919 with 2.
Perillup: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 2005 with 1.
4 fixed thresholds have at least one qualifying day at Perillup.

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

88 years with a qualifying day

Days per year at Perillup with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1955.

Days with 10 mm (0.39 in) or more of precipitation per year at Perillup
Year	Days	Decade average
1916	22	25
1917	34	25
1918	28	25
1919	16	25
1920	25	22.8
1921	23	22.8
1922	19	22.8
1923	35	22.8
1924	22	22.8
1925	15	22.8
1926	26	22.8
1927	19	22.8
1928	24	22.8
1929	20	22.8
1930	15	22
1931	19	22
1932	20	22
1933	34	22
1934	27	22
1935	22	22
1936	16	22
1937	24	22
1938	15	22
1939	28	22
1940	10	19.9
1941	26	19.9
1942	31	19.9
1943	22	19.9
1944	16	19.9
1945	26	19.9
1946	15	19.9
1948	15	19.9
1949	18	19.9
1950	21	23
1951	24	23
1952	19	23
1953	19	23
1955	36	23
1956	25	23
1957	23	23
1958	19	23
1959	21	23
1960	25	22
1961	31	22
1962	21	22
1963	25	22
1964	28	22
1965	21	22
1966	13	22
1967	21	22
1968	23	22
1969	12	22
1970	26	20.1
1971	23	20.1
1972	13	20.1
1973	22	20.1
1974	15	20.1
1975	20	20.1
1976	25	20.1
1977	23	20.1
1978	17	20.1
1979	17	20.1
1980	14	17.7
1981	14	17.7
1982	13	17.7
1983	17	17.7
1984	21	17.7
1985	18	17.7
1986	18	17.7
1987	10	17.7
1988	29	17.7
1989	23	17.7
1990	20	18.9
1991	18	18.9
1992	21	18.9
1993	17	18.9
1994	13	18.9
1995	20	18.9
1996	25	18.9
1997	16	18.9
1998	16	18.9
1999	23	18.9
2000	13	14.2
2001	11	14.2
2002	12	14.2
2003	17	14.2
2004	9	14.2
2005	23	14.2

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

First to last qualifying date each year at Perillup
Year	First date	Last date
1916	1916-02-15	1916-11-23
1917	1917-02-10	1917-12-09
1918	1918-01-20	1918-10-22
1919	1919-04-16	1919-11-05
1920	1920-02-21	1920-10-10
1921	1921-01-16	1921-12-09
1922	1922-02-23	1922-12-07
1923	1923-01-20	1923-10-03
1924	1924-05-15	1924-11-10
1925	1925-04-14	1925-12-31
1926	1926-04-01	1926-11-19
1927	1927-03-13	1927-11-19
1928	1928-01-09	1928-10-21
1929	1929-03-17	1929-11-11
1930	1930-04-15	1930-09-16
1931	1931-03-06	1931-11-12
1932	1932-04-08	1932-10-29
1933	1933-01-17	1933-12-02
1934	1934-01-16	1934-11-28
1935	1935-01-07	1935-10-24
1936	1936-01-29	1936-09-30
1937	1937-03-04	1937-11-25
1938	1938-04-21	1938-12-04
1939	1939-01-19	1939-11-17
1940	1940-04-11	1940-12-18
1941	1941-03-15	1941-11-16
1942	1942-03-14	1942-12-04
1943	1943-01-31	1943-10-11
1944	1944-04-30	1944-12-08
1945	1945-03-27	1945-12-25
1946	1946-05-27	1946-12-04
1948	1948-03-30	1948-12-24
1949	1949-03-12	1949-11-19
1950	1950-05-09	1950-10-10
1951	1951-01-17	1951-12-05
1952	1952-01-23	1952-10-25
1953	1953-02-02	1953-11-16
1955	1955-01-24	1955-12-14
1956	1956-03-05	1956-12-05
1957	1957-04-22	1957-12-29
1958	1958-01-26	1958-12-22
1959	1959-05-04	1959-12-31
1960	1960-01-08	1960-12-19
1961	1961-01-26	1961-12-16
1962	1962-03-16	1962-12-26
1963	1963-01-30	1963-10-31
1964	1964-06-06	1964-12-19
1965	1965-03-26	1965-12-20
1966	1966-04-27	1966-11-04
1967	1967-03-15	1967-10-08
1968	1968-01-27	1968-10-31
1969	1969-03-13	1969-11-04
1970	1970-02-05	1970-12-31
1971	1971-01-08	1971-11-23
1972	1972-01-06	1972-10-08
1973	1973-02-21	1973-12-01
1974	1974-01-26	1974-11-18
1975	1975-04-02	1975-11-16
1976	1976-01-07	1976-11-28
1977	1977-04-27	1977-12-23
1978	1978-02-17	1978-12-20
1979	1979-01-12	1979-11-08
1980	1980-02-11	1980-10-21
1981	1981-05-30	1981-11-26
1982	1982-01-21	1982-11-27
1983	1983-05-03	1983-12-31
1984	1984-02-26	1984-11-17
1985	1985-01-19	1985-12-29
1986	1986-02-21	1986-10-17
1987	1987-04-08	1987-11-15
1988	1988-03-24	1988-10-21
1989	1989-01-15	1989-11-12
1990	1990-01-29	1990-11-02
1991	1991-02-27	1991-12-26
1992	1992-02-07	1992-12-09
1993	1993-03-18	1993-11-16
1994	1994-05-12	1994-11-26
1995	1995-03-25	1995-12-25
1996	1996-05-05	1996-12-13
1997	1997-02-24	1997-10-10
1998	1998-03-11	1998-09-22
1999	1999-03-20	1999-12-20
2000	2000-01-15	2000-09-06
2001	2001-05-06	2001-12-05
2002	2002-03-23	2002-11-01
2003	2003-02-17	2003-12-18
2004	2004-02-19	2004-11-24
2005	2005-01-02	2005-11-28

Every Fixed Threshold

Fixed thresholds at Perillup
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	88	36	1955	23
25 mm (0.98 in): Days with 25 mm or more rain	80	6	1934	6
50 mm (1.97 in): Days with 50 mm or more rain	20	2	1919	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	2005	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.

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Data for Perillup 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).

Perillup Threshold Days by Year

Key Facts for Perillup Thresholds

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

Every Fixed Threshold

Download the Data

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