Waroona Threshold Days by Year (ASN00009614)

4 fixed thresholds counted per year at Waroona (ASN00009614): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waroona Thresholds

Waroona: days with 10 mm (0.39 in) or more of precipitation in 57 years, most in 1955 with 55.
Waroona: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 1945 with 19.
Waroona: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1945 with 5.
Waroona: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1941 with 1.
4 fixed thresholds have at least one qualifying day at Waroona.

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

57 years with a qualifying day

Days per year at Waroona with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 1955.

Days with 10 mm (0.39 in) or more of precipitation per year at Waroona
Year	Days	Decade average
1936	34	33.8
1937	31	33.8
1938	30	33.8
1939	40	33.8
1940	17	34
1941	38	34
1944	24	34
1945	47	34
1946	41	34
1947	38	34
1948	34	34
1949	33	34
1950	31	35.7
1951	29	35.7
1952	37	35.7
1953	33	35.7
1954	30	35.7
1955	55	35.7
1956	39	35.7
1957	39	35.7
1958	34	35.7
1959	30	35.7
1960	32	37
1961	34	37
1962	35	37
1963	49	37
1964	44	37
1965	35	37
1966	37	37
1967	34	37
1968	42	37
1969	28	37
1970	36	33.6
1971	24	33.6
1972	21	33.6
1973	48	33.6
1974	39	33.6
1982	35	35
1990	37	36
1992	49	36
1993	29	36
1994	26	36
1995	33	36
1996	44	36
1998	34	36
2000	27	29.1
2002	28	29.1
2003	33	29.1
2004	34	29.1
2005	30	29.1
2006	16	29.1
2007	31	29.1
2008	33	29.1
2009	30	29.1
2010	19	26.3
2011	30	26.3
2012	30	26.3

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

First to last qualifying date each year at Waroona
Year	First date	Last date
1936	1936-04-23	1936-09-30
1937	1937-02-11	1937-10-22
1938	1938-03-16	1938-11-02
1939	1939-01-24	1939-10-04
1940	1940-05-23	1940-10-21
1941	1941-04-01	1941-09-20
1944	1944-04-29	1944-12-07
1945	1945-04-09	1945-12-25
1946	1946-04-20	1946-11-12
1947	1947-04-03	1947-10-25
1948	1948-03-29	1948-12-24
1949	1949-03-12	1949-11-07
1950	1950-05-04	1950-11-05
1951	1951-02-22	1951-12-05
1952	1952-03-28	1952-11-05
1953	1953-02-02	1953-11-16
1954	1954-04-12	1954-11-11
1955	1955-02-15	1955-12-14
1956	1956-03-05	1956-11-29
1957	1957-03-19	1957-10-21
1958	1958-02-13	1958-12-22
1959	1959-04-12	1959-12-31
1960	1960-01-01	1960-10-15
1961	1961-01-26	1961-12-15
1962	1962-05-12	1962-11-30
1963	1963-04-19	1963-10-17
1964	1964-04-02	1964-12-19
1965	1965-03-26	1965-11-08
1966	1966-01-03	1966-12-27
1967	1967-02-18	1967-11-16
1968	1968-01-08	1968-10-22
1969	1969-03-13	1969-11-03
1970	1970-02-06	1970-11-04
1971	1971-03-27	1971-10-05
1972	1972-04-20	1972-10-28
1973	1973-04-24	1973-11-05
1974	1974-04-04	1974-11-18
1982	1982-01-21	1982-10-25
1990	1990-01-30	1990-10-10
1992	1992-02-07	1992-11-30
1993	1993-03-19	1993-11-10
1994	1994-05-21	1994-10-14
1995	1995-04-09	1995-11-08
1996	1996-04-12	1996-12-12
1998	1998-03-10	1998-11-14
2000	2000-01-15	2000-11-27
2002	2002-04-17	2002-11-01
2003	2003-02-17	2003-11-18
2004	2004-05-07	2004-10-21
2005	2005-03-31	2005-12-11
2006	2006-01-25	2006-11-29
2007	2007-01-03	2007-10-27
2008	2008-04-01	2008-12-21
2009	2009-02-26	2009-11-19
2010	2010-03-23	2010-10-21
2011	2011-01-06	2011-12-31
2012	2012-04-05	2012-11-29

Every Fixed Threshold

Fixed thresholds at Waroona
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	57	55	1955	30
25 mm (0.98 in): Days with 25 mm or more rain	57	19	1945	6
50 mm (1.97 in): Days with 50 mm or more rain	29	5	1945	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1941	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.

Download the Data

Data for Waroona 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).

Waroona Threshold Days by Year (ASN00009614)

Key Facts for Waroona Thresholds

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

Every Fixed Threshold

Download the Data

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