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Built 2026-10-19 (19 October 2026)

Thornleigh Threshold Days by Year (ASN00036081)

4 fixed thresholds counted per year at Thornleigh (ASN00036081): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Thornleigh Thresholds

  • Thornleigh: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1976 with 22.
  • Thornleigh: days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1973 with 9.
  • Thornleigh: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1990 with 5.
  • Thornleigh: days with 100 mm (3.94 in) or more of precipitation in 5 years, most in 1990 with 2.
  • 4 fixed thresholds have at least one qualifying day at Thornleigh.
40 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Thornleigh Days per year at Thornleigh with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1976. 01020301970: 101971: 151972: 111973: 201974: 211975: 151976: 221977: 201978: 151979: 121980: 91981: 141982: 61983: 181984: 131985: 81986: 131987: 141988: 101989: 211990: 211991: 101992: 131993: 121994: 101995: 101996: 161997: 171998: 201999: 192000: 182001: 132002: 32003: 72004: 132005: 112006: 142007: 92008: 92009: 151970197419781982198619901994199820022006
Days per year at Thornleigh with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1976.
Days with 10 mm (0.39 in) or more of precipitation per year at Thornleigh
YearDaysDecade average
19701016.1
19711516.1
19721116.1
19732016.1
19742116.1
19751516.1
19762216.1
19772016.1
19781516.1
19791216.1
1980912.6
19811412.6
1982612.6
19831812.6
19841312.6
1985812.6
19861312.6
19871412.6
19881012.6
19892112.6
19902114.8
19911014.8
19921314.8
19931214.8
19941014.8
19951014.8
19961614.8
19971714.8
19982014.8
19991914.8
20001811.2
20011311.2
2002311.2
2003711.2
20041311.2
20051111.2
20061411.2
2007911.2
2008911.2
20091511.2
First to last qualifying date each year at Thornleigh For each year, a bar from the first to the last day at Thornleigh meeting 10 mm (0.39 in). 1970: 4 February 1970 to 9 December 19701971: 30 January 1971 to 27 December 19711972: 6 January 1972 to 31 December 19721973: 11 January 1973 to 26 December 19731974: 1 January 1974 to 18 November 19741975: 3 January 1975 to 26 December 19751976: 12 January 1976 to 22 December 19761977: 16 January 1977 to 2 December 19771978: 23 January 1978 to 25 December 19781979: 5 February 1979 to 28 December 19791980: 5 January 1980 to 26 November 19801981: 16 January 1981 to 20 November 19811982: 19 January 1982 to 30 May 19821983: 28 January 1983 to 31 December 19831984: 1 January 1984 to 14 December 19841985: 2 June 1985 to 9 December 19851986: 10 January 1986 to 7 December 19861987: 6 January 1987 to 29 December 19871988: 1 April 1988 to 27 December 19881989: 25 January 1989 to 23 December 19891990: 15 January 1990 to 9 December 19901991: 5 January 1991 to 30 October 19911992: 29 January 1992 to 20 December 19921993: 14 January 1993 to 10 December 19931994: 1 February 1994 to 30 November 19941995: 5 January 1995 to 18 November 19951996: 3 January 1996 to 8 December 19961997: 28 January 1997 to 12 December 19971998: 12 January 1998 to 31 December 19981999: 1 January 1999 to 18 December 19992000: 15 February 2000 to 16 December 20002001: 11 January 2001 to 16 December 20012002: 5 January 2002 to 8 January 20022003: 5 January 2003 to 5 December 20032004: 11 January 2004 to 10 December 20042005: 5 January 2005 to 25 November 20052006: 11 January 2006 to 31 December 20062007: 25 January 2007 to 28 November 20072008: 6 February 2008 to 20 November 20082009: 5 January 2009 to 29 October 200919701975198019851990199520002005JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Thornleigh meeting 10 mm (0.39 in).
First to last qualifying date each year at Thornleigh
YearFirst dateLast date
19701970-02-041970-12-09
19711971-01-301971-12-27
19721972-01-061972-12-31
19731973-01-111973-12-26
19741974-01-011974-11-18
19751975-01-031975-12-26
19761976-01-121976-12-22
19771977-01-161977-12-02
19781978-01-231978-12-25
19791979-02-051979-12-28
19801980-01-051980-11-26
19811981-01-161981-11-20
19821982-01-191982-05-30
19831983-01-281983-12-31
19841984-01-011984-12-14
19851985-06-021985-12-09
19861986-01-101986-12-07
19871987-01-061987-12-29
19881988-04-011988-12-27
19891989-01-251989-12-23
19901990-01-151990-12-09
19911991-01-051991-10-30
19921992-01-291992-12-20
19931993-01-141993-12-10
19941994-02-011994-11-30
19951995-01-051995-11-18
19961996-01-031996-12-08
19971997-01-281997-12-12
19981998-01-121998-12-31
19991999-01-011999-12-18
20002000-02-152000-12-16
20012001-01-112001-12-16
20022002-01-052002-01-08
20032003-01-052003-12-05
20042004-01-112004-12-10
20052005-01-052005-11-25
20062006-01-112006-12-31
20072007-01-252007-11-28
20082008-02-062008-11-20
20092009-01-052009-10-29

Every Fixed Threshold

Fixed thresholds at Thornleigh
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4022197615
25 mm (0.98 in): Days with 25 mm or more rain40919737
50 mm (1.97 in): Days with 50 mm or more rain30519901
100 mm (3.94 in): Days with 100 mm or more rain5219901

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.

Download the Data

  • Data for Thornleigh 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).