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Built 2026-10-18 (18 October 2026)

Simpson South Threshold Days by Year

4 fixed thresholds counted per year at Simpson South (ASN00090165): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Simpson South Thresholds

  • Simpson South: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1968 with 47.
  • Simpson South: days with 25 mm (0.98 in) or more of precipitation in 51 years, most in 1971 with 13.
  • Simpson South: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1979 with 2.
  • Simpson South: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1968 with 1.
  • 4 fixed thresholds have at least one qualifying day at Simpson South.
52 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Simpson South Days per year at Simpson South with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 47 in 1968. 02040601968: 471969: 281970: 351971: 421972: 281973: 391975: 311976: 251977: 271978: 241979: 201980: 271981: 211982: 141983: 181984: 231985: 271986: 341987: 271988: 281990: 301991: 351992: 361993: 261994: 291995: 301997: 171998: 261999: 192000: 332001: 362002: 292003: 312004: 332005: 252006: 142007: 342008: 272009: 342010: 382011: 312012: 252013: 392018: 282019: 302020: 352021: 362022: 382023: 292024: 132025: 292026: 21196819751981198719942001200720132023
Days per year at Simpson South with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 47 in 1968.
Days with 10 mm (0.39 in) or more of precipitation per year at Simpson South
YearDaysDecade average
19684737.5
19692837.5
19703530.1
19714230.1
19722830.1
19733930.1
19753130.1
19762530.1
19772730.1
19782430.1
19792030.1
19802724.3
19812124.3
19821424.3
19831824.3
19842324.3
19852724.3
19863424.3
19872724.3
19882824.3
19903027.6
19913527.6
19923627.6
19932627.6
19942927.6
19953027.6
19971727.6
19982627.6
19991927.6
20003329.6
20013629.6
20022929.6
20033129.6
20043329.6
20052529.6
20061429.6
20073429.6
20082729.6
20093429.6
20103831.8
20113131.8
20122531.8
20133931.8
20182831.8
20193031.8
20203528.7
20213628.7
20223828.7
20232928.7
20241328.7
20252928.7
20262128.7
First to last qualifying date each year at Simpson South For each year, a bar from the first to the last day at Simpson South meeting 10 mm (0.39 in). 1968: 29 March 1968 to 16 December 19681969: 26 January 1969 to 19 November 19691970: 3 January 1970 to 31 December 19701971: 1 January 1971 to 24 December 19711972: 12 January 1972 to 10 November 19721973: 14 January 1973 to 22 December 19731975: 11 January 1975 to 23 November 19751976: 25 January 1976 to 15 December 19761977: 14 January 1977 to 29 November 19771978: 30 January 1978 to 17 December 19781979: 20 January 1979 to 17 December 19791980: 12 January 1980 to 19 November 19801981: 9 January 1981 to 28 October 19811982: 25 January 1982 to 8 December 19821983: 27 January 1983 to 30 November 19831984: 13 March 1984 to 20 December 19841985: 16 March 1985 to 17 December 19851986: 10 January 1986 to 17 December 19861987: 4 January 1987 to 2 December 19871988: 1 January 1988 to 25 December 19881990: 1 February 1990 to 10 November 19901991: 4 January 1991 to 17 December 19911992: 6 February 1992 to 21 December 19921993: 25 January 1993 to 28 December 19931994: 4 January 1994 to 21 December 19941995: 6 February 1995 to 4 December 19951997: 7 January 1997 to 14 November 19971998: 14 January 1998 to 27 December 19981999: 7 February 1999 to 28 December 19992000: 26 January 2000 to 23 December 20002001: 13 February 2001 to 26 December 20012002: 1 January 2002 to 31 December 20022003: 30 January 2003 to 22 December 20032004: 8 January 2004 to 11 December 20042005: 5 January 2005 to 13 December 20052006: 2 January 2006 to 23 December 20062007: 7 January 2007 to 23 December 20072008: 7 February 2008 to 30 December 20082009: 5 March 2009 to 18 December 20092010: 18 January 2010 to 18 December 20102011: 12 January 2011 to 27 November 20112012: 10 January 2012 to 15 December 20122013: 1 February 2013 to 21 December 20132018: 14 January 2018 to 15 December 20182019: 9 February 2019 to 2 December 20192020: 11 January 2020 to 22 December 20202021: 3 January 2021 to 13 November 20212022: 14 January 2022 to 14 December 20222023: 18 January 2023 to 26 December 20232024: 17 January 2024 to 30 November 20242025: 15 March 2025 to 21 December 20252026: 28 February 2026 to 4 August 202619681976198319911999200620132024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Simpson South meeting 10 mm (0.39 in).
First to last qualifying date each year at Simpson South
YearFirst dateLast date
19681968-03-291968-12-16
19691969-01-261969-11-19
19701970-01-031970-12-31
19711971-01-011971-12-24
19721972-01-121972-11-10
19731973-01-141973-12-22
19751975-01-111975-11-23
19761976-01-251976-12-15
19771977-01-141977-11-29
19781978-01-301978-12-17
19791979-01-201979-12-17
19801980-01-121980-11-19
19811981-01-091981-10-28
19821982-01-251982-12-08
19831983-01-271983-11-30
19841984-03-131984-12-20
19851985-03-161985-12-17
19861986-01-101986-12-17
19871987-01-041987-12-02
19881988-01-011988-12-25
19901990-02-011990-11-10
19911991-01-041991-12-17
19921992-02-061992-12-21
19931993-01-251993-12-28
19941994-01-041994-12-21
19951995-02-061995-12-04
19971997-01-071997-11-14
19981998-01-141998-12-27
19991999-02-071999-12-28
20002000-01-262000-12-23
20012001-02-132001-12-26
20022002-01-012002-12-31
20032003-01-302003-12-22
20042004-01-082004-12-11
20052005-01-052005-12-13
20062006-01-022006-12-23
20072007-01-072007-12-23
20082008-02-072008-12-30
20092009-03-052009-12-18
20102010-01-182010-12-18
20112011-01-122011-11-27
20122012-01-102012-12-15
20132013-02-012013-12-21
20182018-01-142018-12-15
20192019-02-092019-12-02
20202020-01-112020-12-22
20212021-01-032021-11-13
20222022-01-142022-12-14
20232023-01-182023-12-26
20242024-01-172024-11-30
20252025-03-152025-12-21
20262026-02-282026-08-04

Every Fixed Threshold

Fixed thresholds at Simpson South
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5247196821
25 mm (0.98 in): Days with 25 mm or more rain511319711
50 mm (1.97 in): Days with 50 mm or more rain16219791
100 mm (3.94 in): Days with 100 mm or more rain3119681

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Simpson South 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-15).