Built 2026-10-19 (19 October 2026)

Mount Wittenoom Threshold Days by Year (ASN00007060)

3 fixed thresholds counted per year at Mount Wittenoom (ASN00007060): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mount Wittenoom Thresholds

  • Mount Wittenoom: days with 10 mm (0.39 in) or more of precipitation in 76 years, most in 1915 with 15.
  • Mount Wittenoom: days with 25 mm (0.98 in) or more of precipitation in 59 years, most in 1909 with 5.
  • Mount Wittenoom: days with 50 mm (1.97 in) or more of precipitation in 18 years, most in 1918 with 3.
  • 3 fixed thresholds have at least one qualifying day at Mount Wittenoom.
76 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Mount Wittenoom Days per year at Mount Wittenoom with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1915. 0510151907: 71908: 81909: 101910: 81911: 31912: 21913: 71914: 61915: 151916: 71917: 111918: 111919: 61920: 51921: 81922: 81923: 61925: 61926: 121927: 111928: 41930: 61932: 91933: 91934: 81935: 71936: 41937: 31938: 41939: 61940: 31941: 61942: 111943: 61944: 21945: 91946: 31947: 101948: 41949: 51950: 51951: 71952: 81953: 101954: 51955: 51956: 51957: 51958: 91959: 21960: 111961: 31962: 41963: 121964: 61965: 91967: 31968: 71984: 151986: 71987: 71988: 61989: 61990: 51991: 31992: 131993: 101994: 61995: 91996: 111997: 111999: 52000: 92001: 42002: 22003: 21907191519231934194219501958196719912000
Days per year at Mount Wittenoom with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1915.
Days with 10 mm (0.39 in) or more of precipitation per year at Mount Wittenoom
YearDaysDecade average
190778.3
190888.3
1909108.3
191087.6
191137.6
191227.6
191377.6
191467.6
1915157.6
191677.6
1917117.6
1918117.6
191967.6
192057.5
192187.5
192287.5
192367.5
192567.5
1926127.5
1927117.5
192847.5
193066.2
193296.2
193396.2
193486.2
193576.2
193646.2
193736.2
193846.2
193966.2
194035.9
194165.9
1942115.9
194365.9
194425.9
194595.9
194635.9
1947105.9
194845.9
194955.9
195056.1
195176.1
195286.1
1953106.1
195456.1
195556.1
195656.1
195756.1
195896.1
195926.1
1960116.9
196136.9
196246.9
1963126.9
196466.9
196596.9
196736.9
196876.9
1984158.2
198678.2
198778.2
198868.2
198968.2
199058.1
199138.1
1992138.1
1993108.1
199468.1
199598.1
1996118.1
1997118.1
199958.1
200094.3
200144.3
200224.3
200324.3
First to last qualifying date each year at Mount Wittenoom For each year, a bar from the first to the last day at Mount Wittenoom meeting 10 mm (0.39 in). 1907: 15 January 1907 to 30 July 19071908: 1 February 1908 to 8 December 19081909: 6 January 1909 to 10 November 19091910: 12 May 1910 to 17 December 19101911: 27 January 1911 to 9 July 19111912: 5 May 1912 to 26 May 19121913: 4 January 1913 to 19 August 19131914: 7 April 1914 to 4 December 19141915: 7 January 1915 to 29 August 19151916: 20 January 1916 to 5 October 19161917: 25 January 1917 to 17 November 19171918: 4 February 1918 to 13 September 19181919: 3 May 1919 to 9 December 19191920: 19 February 1920 to 5 August 19201921: 13 February 1921 to 11 June 19211922: 26 March 1922 to 25 August 19221923: 8 April 1923 to 27 July 19231925: 16 January 1925 to 9 September 19251926: 5 February 1926 to 19 November 19261927: 19 March 1927 to 27 December 19271928: 30 January 1928 to 20 July 19281930: 8 March 1930 to 5 August 19301932: 29 March 1932 to 19 December 19321933: 6 March 1933 to 25 August 19331934: 2 January 1934 to 7 July 19341935: 30 January 1935 to 6 August 19351936: 3 June 1936 to 8 July 19361937: 19 April 1937 to 22 June 19371938: 17 January 1938 to 16 July 19381939: 14 February 1939 to 10 November 19391940: 28 May 1940 to 27 July 19401941: 5 April 1941 to 15 December 19411942: 1 January 1942 to 11 August 19421943: 13 February 1943 to 8 December 19431944: 24 May 1944 to 2 July 19441945: 4 February 1945 to 22 September 19451946: 4 February 1946 to 21 July 19461947: 5 March 1947 to 25 October 19471948: 21 February 1948 to 29 August 19481949: 28 April 1949 to 4 November 19491950: 9 May 1950 to 29 July 19501951: 13 January 1951 to 8 June 19511952: 21 January 1952 to 28 July 19521953: 23 March 1953 to 3 October 19531954: 6 January 1954 to 20 August 19541955: 1 January 1955 to 18 February 19551956: 7 May 1956 to 31 October 19561957: 27 January 1957 to 4 December 19571958: 14 January 1958 to 25 November 19581959: 1 June 1959 to 25 July 19591960: 1 February 1960 to 23 July 19601961: 26 January 1961 to 6 December 19611962: 7 February 1962 to 11 July 19621963: 11 January 1963 to 23 December 19631964: 18 February 1964 to 25 September 19641965: 13 January 1965 to 24 November 19651967: 27 June 1967 to 3 December 19671968: 23 March 1968 to 24 June 19681984: 28 January 1984 to 8 October 19841986: 29 January 1986 to 11 September 19861987: 21 January 1987 to 11 November 19871988: 25 January 1988 to 4 December 19881989: 6 January 1989 to 13 June 19891990: 27 January 1990 to 3 August 19901991: 2 July 1991 to 20 July 19911992: 26 January 1992 to 26 August 19921993: 11 April 1993 to 14 November 19931994: 22 February 1994 to 11 August 19941995: 14 January 1995 to 13 December 19951996: 8 February 1996 to 6 November 19961997: 4 February 1997 to 21 October 19971999: 15 February 1999 to 28 May 19992000: 4 January 2000 to 8 December 20002001: 8 January 2001 to 12 December 20012002: 29 January 2002 to 23 December 20022003: 16 May 2003 to 17 November 200319071917192819401950196019871997JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mount Wittenoom meeting 10 mm (0.39 in).
First to last qualifying date each year at Mount Wittenoom
YearFirst dateLast date
19071907-01-151907-07-30
19081908-02-011908-12-08
19091909-01-061909-11-10
19101910-05-121910-12-17
19111911-01-271911-07-09
19121912-05-051912-05-26
19131913-01-041913-08-19
19141914-04-071914-12-04
19151915-01-071915-08-29
19161916-01-201916-10-05
19171917-01-251917-11-17
19181918-02-041918-09-13
19191919-05-031919-12-09
19201920-02-191920-08-05
19211921-02-131921-06-11
19221922-03-261922-08-25
19231923-04-081923-07-27
19251925-01-161925-09-09
19261926-02-051926-11-19
19271927-03-191927-12-27
19281928-01-301928-07-20
19301930-03-081930-08-05
19321932-03-291932-12-19
19331933-03-061933-08-25
19341934-01-021934-07-07
19351935-01-301935-08-06
19361936-06-031936-07-08
19371937-04-191937-06-22
19381938-01-171938-07-16
19391939-02-141939-11-10
19401940-05-281940-07-27
19411941-04-051941-12-15
19421942-01-011942-08-11
19431943-02-131943-12-08
19441944-05-241944-07-02
19451945-02-041945-09-22
19461946-02-041946-07-21
19471947-03-051947-10-25
19481948-02-211948-08-29
19491949-04-281949-11-04
19501950-05-091950-07-29
19511951-01-131951-06-08
19521952-01-211952-07-28
19531953-03-231953-10-03
19541954-01-061954-08-20
19551955-01-011955-02-18
19561956-05-071956-10-31
19571957-01-271957-12-04
19581958-01-141958-11-25
19591959-06-011959-07-25
19601960-02-011960-07-23
19611961-01-261961-12-06
19621962-02-071962-07-11
19631963-01-111963-12-23
19641964-02-181964-09-25
19651965-01-131965-11-24
19671967-06-271967-12-03
19681968-03-231968-06-24
19841984-01-281984-10-08
19861986-01-291986-09-11
19871987-01-211987-11-11
19881988-01-251988-12-04
19891989-01-061989-06-13
19901990-01-271990-08-03
19911991-07-021991-07-20
19921992-01-261992-08-26
19931993-04-111993-11-14
19941994-02-221994-08-11
19951995-01-141995-12-13
19961996-02-081996-11-06
19971997-02-041997-10-21
19991999-02-151999-05-28
20002000-01-042000-12-08
20012001-01-082001-12-12
20022002-01-292002-12-23
20032003-05-162003-11-17

Every Fixed Threshold

Fixed thresholds at Mount Wittenoom
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain761519152
25 mm (0.98 in): Days with 25 mm or more rain59519091
50 mm (1.97 in): Days with 50 mm or more rain18319182

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

  • Data for Mount 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 . Last revised (2025-12-31).