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Data as of 2025-12-31
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Built 2026-10-16 (16 October 2026)

Wittenoom Hills Threshold Days by Year

4 fixed thresholds counted per year at Wittenoom Hills (ASN00012255): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wittenoom Hills Thresholds

  • Wittenoom Hills: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 1992 with 25.
  • Wittenoom Hills: days with 25 mm (0.98 in) or more of precipitation in 29 years, most in 2000 with 6.
  • Wittenoom Hills: days with 50 mm (1.97 in) or more of precipitation in 4 years, most in 1992 with 1.
  • Wittenoom Hills: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1999 with 1.
  • 4 fixed thresholds have at least one qualifying day at Wittenoom Hills.
34 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Wittenoom Hills Days per year at Wittenoom Hills with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 25 in 1992. 01020301971: 201972: 121973: 181974: 141975: 141976: 111977: 101978: 131979: 121980: 121981: 211982: 91983: 111984: 121985: 141986: 141987: 121988: 101989: 161990: 111991: 91992: 251993: 111994: 81995: 151996: 71997: 161998: 101999: 152000: 212001: 182002: 82003: 172004: 9197119751979198319871991199519992003
Days per year at Wittenoom Hills with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 25 in 1992.
Days with 10 mm (0.39 in) or more of precipitation per year at Wittenoom Hills
YearDaysDecade average
19712013.8
19721213.8
19731813.8
19741413.8
19751413.8
19761113.8
19771013.8
19781313.8
19791213.8
19801213.1
19812113.1
1982913.1
19831113.1
19841213.1
19851413.1
19861413.1
19871213.1
19881013.1
19891613.1
19901112.7
1991912.7
19922512.7
19931112.7
1994812.7
19951512.7
1996712.7
19971612.7
19981012.7
19991512.7
20002114.6
20011814.6
2002814.6
20031714.6
2004914.6
First to last qualifying date each year at Wittenoom Hills For each year, a bar from the first to the last day at Wittenoom Hills meeting 10 mm (0.39 in). 1971: 26 January 1971 to 24 November 19711972: 6 January 1972 to 11 September 19721973: 23 January 1973 to 1 December 19731974: 28 February 1974 to 18 November 19741975: 1 April 1975 to 11 December 19751976: 8 January 1976 to 4 October 19761977: 16 May 1977 to 30 October 19771978: 15 February 1978 to 22 December 19781979: 14 February 1979 to 10 September 19791980: 25 February 1980 to 31 December 19801981: 13 January 1981 to 8 November 19811982: 7 March 1982 to 29 November 19821983: 22 January 1983 to 5 December 19831984: 1 January 1984 to 9 November 19841985: 9 February 1985 to 29 November 19851986: 20 February 1986 to 29 November 19861987: 27 March 1987 to 2 November 19871988: 12 January 1988 to 30 December 19881989: 9 April 1989 to 12 November 19891990: 14 January 1990 to 5 August 19901991: 24 May 1991 to 27 December 19911992: 10 February 1992 to 2 December 19921993: 17 March 1993 to 17 November 19931994: 30 March 1994 to 15 October 19941995: 8 January 1995 to 18 October 19951996: 25 March 1996 to 18 September 19961997: 5 February 1997 to 13 November 19971998: 8 April 1998 to 19 October 19981999: 5 January 1999 to 2 December 19992000: 11 January 2000 to 9 August 20002001: 19 January 2001 to 1 December 20012002: 17 April 2002 to 23 November 20022003: 24 March 2003 to 26 November 20032004: 6 January 2004 to 7 September 20041971197619811986199119962001JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wittenoom Hills meeting 10 mm (0.39 in).
First to last qualifying date each year at Wittenoom Hills
YearFirst dateLast date
19711971-01-261971-11-24
19721972-01-061972-09-11
19731973-01-231973-12-01
19741974-02-281974-11-18
19751975-04-011975-12-11
19761976-01-081976-10-04
19771977-05-161977-10-30
19781978-02-151978-12-22
19791979-02-141979-09-10
19801980-02-251980-12-31
19811981-01-131981-11-08
19821982-03-071982-11-29
19831983-01-221983-12-05
19841984-01-011984-11-09
19851985-02-091985-11-29
19861986-02-201986-11-29
19871987-03-271987-11-02
19881988-01-121988-12-30
19891989-04-091989-11-12
19901990-01-141990-08-05
19911991-05-241991-12-27
19921992-02-101992-12-02
19931993-03-171993-11-17
19941994-03-301994-10-15
19951995-01-081995-10-18
19961996-03-251996-09-18
19971997-02-051997-11-13
19981998-04-081998-10-19
19991999-01-051999-12-02
20002000-01-112000-08-09
20012001-01-192001-12-01
20022002-04-172002-11-23
20032003-03-242003-11-26
20042004-01-062004-09-07

Every Fixed Threshold

Fixed thresholds at Wittenoom Hills
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain342519929
25 mm (0.98 in): Days with 25 mm or more rain29620001
50 mm (1.97 in): Days with 50 mm or more rain4119921
100 mm (3.94 in): Days with 100 mm or more rain1119991

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

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