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Built 2026-10-18 (18 October 2026)

Wittenoom Aero Threshold Days by Year

5 fixed thresholds counted per year at Wittenoom Aero (ASN00005055): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wittenoom Aero Thresholds

  • Wittenoom Aero: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 2006 with 25.
  • Wittenoom Aero: days with 25 mm (0.98 in) or more of precipitation in 35 years, most in 2006 with 12.
  • Wittenoom Aero: days with 50 mm (1.97 in) or more of precipitation in 24 years, most in 2006 with 8.
  • Wittenoom Aero: days with 100 mm (3.94 in) or more of precipitation in 8 years, most in 1975 with 2.
  • 5 fixed thresholds have at least one qualifying day at Wittenoom Aero.
35 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Wittenoom Aero Days per year at Wittenoom Aero with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 25 in 2006. 01020301975: 101976: 81977: 31978: 141979: 151980: 171981: 121982: 141983: 61984: 161985: 81986: 71987: 101988: 111989: 81990: 51991: 101992: 111993: 91994: 101995: 191996: 71997: 191998: 81999: 242000: 232001: 102002: 72003: 82004: 82005: 42006: 252007: 52008: 142009: 13197519791983198719911995199920032007
Days per year at Wittenoom Aero with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 25 in 2006.
Days with 10 mm (0.39 in) or more of precipitation per year at Wittenoom Aero
YearDaysDecade average
19751010
1976810
1977310
19781410
19791510
19801710.9
19811210.9
19821410.9
1983610.9
19841610.9
1985810.9
1986710.9
19871010.9
19881110.9
1989810.9
1990512.2
19911012.2
19921112.2
1993912.2
19941012.2
19951912.2
1996712.2
19971912.2
1998812.2
19992412.2
20002311.7
20011011.7
2002711.7
2003811.7
2004811.7
2005411.7
20062511.7
2007511.7
20081411.7
20091311.7
First to last qualifying date each year at Wittenoom Aero For each year, a bar from the first to the last day at Wittenoom Aero meeting 10 mm (0.39 in). 1975: 19 February 1975 to 17 December 19751976: 5 January 1976 to 10 October 19761977: 5 January 1977 to 8 March 19771978: 1 January 1978 to 14 November 19781979: 2 January 1979 to 30 December 19791980: 11 January 1980 to 12 December 19801981: 11 January 1981 to 12 December 19811982: 14 January 1982 to 18 December 19821983: 3 February 1983 to 23 December 19831984: 6 January 1984 to 21 December 19841985: 29 January 1985 to 26 July 19851986: 4 January 1986 to 1 October 19861987: 12 January 1987 to 12 February 19871988: 27 January 1988 to 19 December 19881989: 18 January 1989 to 5 November 19891990: 5 January 1990 to 29 January 19901991: 13 January 1991 to 20 July 19911992: 5 January 1992 to 12 June 19921993: 16 January 1993 to 14 August 19931994: 19 January 1994 to 19 December 19941995: 7 January 1995 to 20 December 19951996: 11 April 1996 to 31 December 19961997: 1 January 1997 to 30 August 19971998: 14 April 1998 to 21 November 19981999: 7 January 1999 to 16 December 19992000: 20 January 2000 to 16 December 20002001: 7 January 2001 to 1 May 20012002: 12 February 2002 to 25 December 20022003: 10 January 2003 to 28 June 20032004: 11 February 2004 to 12 April 20042005: 10 July 2005 to 30 December 20052006: 7 January 2006 to 24 December 20062007: 4 January 2007 to 27 March 20072008: 6 January 2008 to 31 December 20082009: 1 January 2009 to 9 November 20091975198019851990199520002005JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wittenoom Aero meeting 10 mm (0.39 in).
First to last qualifying date each year at Wittenoom Aero
YearFirst dateLast date
19751975-02-191975-12-17
19761976-01-051976-10-10
19771977-01-051977-03-08
19781978-01-011978-11-14
19791979-01-021979-12-30
19801980-01-111980-12-12
19811981-01-111981-12-12
19821982-01-141982-12-18
19831983-02-031983-12-23
19841984-01-061984-12-21
19851985-01-291985-07-26
19861986-01-041986-10-01
19871987-01-121987-02-12
19881988-01-271988-12-19
19891989-01-181989-11-05
19901990-01-051990-01-29
19911991-01-131991-07-20
19921992-01-051992-06-12
19931993-01-161993-08-14
19941994-01-191994-12-19
19951995-01-071995-12-20
19961996-04-111996-12-31
19971997-01-011997-08-30
19981998-04-141998-11-21
19991999-01-071999-12-16
20002000-01-202000-12-16
20012001-01-072001-05-01
20022002-02-122002-12-25
20032003-01-102003-06-28
20042004-02-112004-04-12
20052005-07-102005-12-30
20062006-01-072006-12-24
20072007-01-042007-03-27
20082008-01-062008-12-31
20092009-01-012009-11-09

Every Fixed Threshold

Fixed thresholds at Wittenoom Aero
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3525200613
25 mm (0.98 in): Days with 25 mm or more rain351220063
50 mm (1.97 in): Days with 50 mm or more rain24820062
100 mm (3.94 in): Days with 100 mm or more rain8219751
200 mm (7.87 in): Days with 200 mm or more rain1119751

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1975.

Download the Data

  • Data for Wittenoom Aero 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).