Wittenoom Threshold Days by Year (ASN00005026)

14 fixed thresholds counted per year at Wittenoom (ASN00005026): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wittenoom Thresholds

Wittenoom: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 2000 with 29.
Wittenoom: days with a maximum temperature at or above 30 C (86 F) in 60 years, most in 2012 with 273.
Wittenoom: days with a maximum temperature at or above 35 C (95 F) in 60 years, most in 2014 with 197.
Wittenoom: days with a maximum temperature at or above 40 C (104 F) in 60 years, most in 2005 with 110.
14 fixed thresholds have at least one qualifying day at Wittenoom.

Days at or above 30 C (86 F)

60 years with a qualifying day

Days per year at Wittenoom with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 273 in 2012.

Days at or above 30 C (86 F) per year at Wittenoom
Year	Days	Decade average
1959	245	245
1960	222	232.4
1961	238	232.4
1962	251	232.4
1963	233	232.4
1964	226	232.4
1965	248	232.4
1966	212	232.4
1967	245	232.4
1968	204	232.4
1969	245	232.4
1970	214	228.7
1971	226	228.7
1972	255	228.7
1973	226	228.7
1974	219	228.7
1975	241	228.7
1976	227	228.7
1977	244	228.7
1978	218	228.7
1979	217	228.7
1980	236	235.2
1981	248	235.2
1982	237	235.2
1983	231	235.2
1984	224	235.2
1985	245	235.2
1986	231	235.2
1987	240	235.2
1988	222	235.2
1989	238	235.2
1990	255	239.4
1991	246	239.4
1992	217	239.4
1993	216	239.4
1994	260	239.4
1995	219	239.4
1996	268	239.4
1997	236	239.4
1998	265	239.4
1999	212	239.4
2000	214	243
2001	230	243
2002	269	243
2003	249	243
2004	232	243
2005	256	243
2006	222	243
2007	253	243
2008	259	243
2009	246	243
2010	242	252.8
2011	240	252.8
2012	273	252.8
2013	254	252.8
2014	265	252.8
2015	232	252.8
2016	263	252.8
2017	253	252.8
2018	253	252.8

For each year, a bar from the first to the last day at Wittenoom meeting 30 C (86 F).

First to last qualifying date each year at Wittenoom
Year	First date	Last date
1959	1959-01-01	1959-12-31
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-01	1962-12-31
1963	1963-01-01	1963-12-31
1964	1964-01-01	1964-12-31
1965	1965-01-01	1965-12-31
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-01	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-12-30
1974	1974-01-02	1974-12-31
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-01	1982-12-31
1983	1983-01-01	1983-12-31
1984	1984-01-01	1984-12-31
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-01	1987-12-31
1988	1988-01-01	1988-12-31
1989	1989-01-01	1989-12-31
1990	1990-01-01	1990-12-31
1991	1991-01-01	1991-12-31
1992	1992-01-01	1992-12-31
1993	1993-01-01	1993-12-31
1994	1994-01-01	1994-12-31
1995	1995-01-01	1995-12-31
1996	1996-01-01	1996-12-31
1997	1997-01-01	1997-12-31
1998	1998-01-01	1998-12-31
1999	1999-01-01	1999-12-31
2000	2000-01-01	2000-12-31
2001	2001-01-01	2001-12-31
2002	2002-01-01	2002-12-31
2003	2003-01-01	2003-12-31
2004	2004-01-01	2004-12-31
2005	2005-01-01	2005-12-31
2006	2006-01-02	2006-12-31
2007	2007-01-01	2007-12-31
2008	2008-01-01	2008-12-31
2009	2009-01-01	2009-12-31
2010	2010-01-01	2010-12-31
2011	2011-01-01	2011-12-31
2012	2012-01-01	2012-12-31
2013	2013-01-01	2013-12-29
2014	2014-01-01	2014-12-31
2015	2015-01-01	2015-12-31
2016	2016-01-01	2016-12-31
2017	2017-01-01	2017-12-31
2018	2018-01-01	2018-12-31

Every Fixed Threshold

Fixed thresholds at Wittenoom
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	60	273	2012	253
35 C (95 F): Days	60	197	2014	196
40 C (104 F): Days	60	110	2005	67
45 C (113 F): Days	33	10	1998	7
90 F (32.2 C): Days	60	239	2005	229
100 F (37.8 C): Days	60	157	2005	120
110 F (43.3 C): Days	56	32	2015	14
20 C (68 F): Tropical nights (min	59	218	1998	201
25 C (77 F): Days with min	59	119	1959	89
10 mm (0.39 in): Days with 10 mm or more rain	62	29	2000	12
25 mm (0.98 in): Days with 25 mm or more rain	59	16	1999	6
50 mm (1.97 in): Days with 50 mm or more rain	49	9	2006	2
100 mm (3.94 in): Days with 100 mm or more rain	18	3	1999	2
200 mm (7.87 in): Days with 200 mm or more rain	3	1	1975	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.

Download the Data

Data for Wittenoom 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Wittenoom Threshold Days by Year (ASN00005026)

Key Facts for Wittenoom Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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