Yanchep Threshold Days by Year

4 fixed thresholds counted per year at Yanchep (ASN00009045): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Yanchep Thresholds

Yanchep: days with 10 mm (0.39 in) or more of precipitation in 59 years, most in 1939 with 36.
Yanchep: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 1946 with 12.
Yanchep: days with 50 mm (1.97 in) or more of precipitation in 20 years, most in 1987 with 3.
Yanchep: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1993 with 1.
4 fixed thresholds have at least one qualifying day at Yanchep.

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

59 years with a qualifying day

Days per year at Yanchep with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1939.

Days with 10 mm (0.39 in) or more of precipitation per year at Yanchep
Year	Days	Decade average
1935	23	23.8
1936	24	23.8
1937	19	23.8
1938	17	23.8
1939	36	23.8
1940	13	25.9
1941	26	25.9
1942	31	25.9
1943	24	25.9
1944	19	25.9
1945	35	25.9
1946	35	25.9
1947	30	25.9
1948	21	25.9
1949	25	25.9
1950	28	27.9
1951	29	27.9
1952	29	27.9
1953	31	27.9
1954	24	27.9
1955	36	27.9
1956	27	27.9
1957	25	27.9
1958	29	27.9
1959	21	27.9
1960	29	27.8
1961	24	27.8
1962	23	27.8
1963	36	27.8
1964	33	27.8
1965	32	27.8
1966	25	27.8
1967	28	27.8
1968	32	27.8
1969	16	27.8
1970	26	25.1
1971	32	25.1
1972	21	25.1
1973	27	25.1
1974	36	25.1
1975	20	25.1
1976	24	25.1
1977	16	25.1
1978	33	25.1
1979	16	25.1
1980	24	24.4
1981	26	24.4
1982	25	24.4
1983	23	24.4
1984	29	24.4
1985	23	24.4
1986	33	24.4
1987	25	24.4
1988	19	24.4
1989	17	24.4
1990	26	22.8
1991	20	22.8
1992	21	22.8
1993	24	22.8

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

First to last qualifying date each year at Yanchep
Year	First date	Last date
1935	1935-04-03	1935-12-09
1936	1936-05-09	1936-12-18
1937	1937-04-19	1937-11-01
1938	1938-03-16	1938-11-02
1939	1939-01-20	1939-11-09
1940	1940-01-23	1940-10-21
1941	1941-04-22	1941-11-18
1942	1942-03-01	1942-12-03
1943	1943-01-31	1943-09-18
1944	1944-04-30	1944-12-07
1945	1945-03-26	1945-11-12
1946	1946-03-21	1946-11-13
1947	1947-04-07	1947-10-25
1948	1948-04-30	1948-11-15
1949	1949-04-16	1949-11-14
1950	1950-05-05	1950-10-10
1951	1951-01-14	1951-12-05
1952	1952-05-05	1952-12-18
1953	1953-02-01	1953-11-16
1954	1954-04-23	1954-11-11
1955	1955-02-15	1955-10-28
1956	1956-03-04	1956-11-29
1957	1957-04-22	1957-09-05
1958	1958-04-29	1958-12-21
1959	1959-02-06	1959-12-31
1960	1960-01-01	1960-09-23
1961	1961-02-19	1961-12-15
1962	1962-05-12	1962-10-20
1963	1963-01-10	1963-10-31
1964	1964-02-23	1964-10-09
1965	1965-05-01	1965-12-01
1966	1966-04-20	1966-10-22
1967	1967-03-15	1967-10-04
1968	1968-01-27	1968-10-14
1969	1969-03-19	1969-11-03
1970	1970-02-06	1970-09-20
1971	1971-01-17	1971-11-02
1972	1972-04-07	1972-10-08
1973	1973-01-18	1973-10-17
1974	1974-02-03	1974-11-14
1975	1975-05-05	1975-12-09
1976	1976-01-07	1976-11-10
1977	1977-05-10	1977-10-30
1978	1978-02-24	1978-10-01
1979	1979-04-19	1979-08-19
1980	1980-04-19	1980-10-22
1981	1981-05-21	1981-12-01
1982	1982-01-20	1982-10-04
1983	1983-03-17	1983-11-17
1984	1984-03-04	1984-11-07
1985	1985-02-09	1985-11-03
1986	1986-03-20	1986-11-09
1987	1987-04-25	1987-12-04
1988	1988-03-25	1988-11-07
1989	1989-01-26	1989-10-25
1990	1990-01-29	1990-10-15
1991	1991-04-10	1991-12-26
1992	1992-02-09	1992-11-20
1993	1993-02-07	1993-10-07

Every Fixed Threshold

Fixed thresholds at Yanchep
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	59	36	1939	24
25 mm (0.98 in): Days with 25 mm or more rain	58	12	1946	7
50 mm (1.97 in): Days with 50 mm or more rain	20	3	1987	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1993	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1935.

Download the Data

Data for Yanchep 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Yanchep Threshold Days by Year

Key Facts for Yanchep Thresholds

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

Every Fixed Threshold

Download the Data

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