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Built 2026-10-19 (19 October 2026)

Ontario 3E Threshold Days by Year (USC00476280)

7 fixed thresholds counted per year at Ontario 3E (USC00476280): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ontario 3E Thresholds

  • Ontario 3E: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1993 with 40.
  • Ontario 3E: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 2016 with 16.
  • Ontario 3E: days with 10 cm (3.9 in) or more of snowfall in 37 years, most in 2007 with 8.
  • Ontario 3E: days with 50 mm (1.97 in) or more of precipitation in 34 years, most in 2018 with 5.
  • 7 fixed thresholds have at least one qualifying day at Ontario 3E.
42 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Ontario 3E Days per year at Ontario 3E with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1993. 0102030401979: 331980: 241981: 281982: 351983: 331984: 351985: 311986: 261987: 261988: 211989: 221990: 361991: 341992: 291993: 401994: 331995: 331996: 291997: 231998: 321999: 282000: 272001: 342002: 272003: 232004: 342005: 272006: 282007: 322009: 242010: 362011: 252012: 202013: 312014: 272015: 262016: 342017: 302018: 302019: 352020: 212026: 15197919841989199419992004201020152020
Days per year at Ontario 3E with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1993.
Days with 10 mm (0.39 in) or more of precipitation per year at Ontario 3E
YearDaysDecade average
19793333
19802428.1
19812828.1
19823528.1
19833328.1
19843528.1
19853128.1
19862628.1
19872628.1
19882128.1
19892228.1
19903631.7
19913431.7
19922931.7
19934031.7
19943331.7
19953331.7
19962931.7
19972331.7
19983231.7
19992831.7
20002728.4
20013428.4
20022728.4
20032328.4
20043428.4
20052728.4
20062828.4
20073228.4
20092428.4
20103629.4
20112529.4
20122029.4
20133129.4
20142729.4
20152629.4
20163429.4
20173029.4
20183029.4
20193529.4
20202118
20261518
First to last qualifying date each year at Ontario 3E For each year, a bar from the first to the last day at Ontario 3E meeting 10 mm (0.39 in). 1979: 23 February 1979 to 23 December 19791980: 16 January 1980 to 24 October 19801981: 22 February 1981 to 27 November 19811982: 2 January 1982 to 27 December 19821983: 15 March 1983 to 27 November 19831984: 18 February 1984 to 27 December 19841985: 3 March 1985 to 30 November 19851986: 18 March 1986 to 11 October 19861987: 28 February 1987 to 28 November 19871988: 25 March 1988 to 19 December 19881989: 14 March 1989 to 27 November 19891990: 16 January 1990 to 14 December 19901991: 22 March 1991 to 20 December 19911992: 22 January 1992 to 25 November 19921993: 12 January 1993 to 15 October 19931994: 22 February 1994 to 27 November 19941995: 6 March 1995 to 27 November 19951996: 17 January 1996 to 23 December 19961997: 3 January 1997 to 12 October 19971998: 4 January 1998 to 9 November 19981999: 2 January 1999 to 23 November 19992000: 13 February 2000 to 29 December 20002001: 30 January 2001 to 23 December 20012002: 1 February 2002 to 4 October 20022003: 31 January 2003 to 22 November 20032004: 6 February 2004 to 20 November 20042005: 2 January 2005 to 29 November 20052006: 3 January 2006 to 28 November 20062007: 1 January 2007 to 23 December 20072009: 9 March 2009 to 25 December 20092010: 24 January 2010 to 12 December 20102011: 21 February 2011 to 4 December 20112012: 29 February 2012 to 20 December 20122013: 11 February 2013 to 17 November 20132014: 21 February 2014 to 23 December 20142015: 25 March 2015 to 29 December 20152016: 2 February 2016 to 26 December 20162017: 10 January 2017 to 22 October 20172018: 23 January 2018 to 2 December 20182019: 1 January 2019 to 29 December 20192020: 20 March 2020 to 11 November 20202026: 9 January 2026 to 20 September 20261979198519911997200320102016JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Ontario 3E meeting 10 mm (0.39 in).
First to last qualifying date each year at Ontario 3E
YearFirst dateLast date
19791979-02-231979-12-23
19801980-01-161980-10-24
19811981-02-221981-11-27
19821982-01-021982-12-27
19831983-03-151983-11-27
19841984-02-181984-12-27
19851985-03-031985-11-30
19861986-03-181986-10-11
19871987-02-281987-11-28
19881988-03-251988-12-19
19891989-03-141989-11-27
19901990-01-161990-12-14
19911991-03-221991-12-20
19921992-01-221992-11-25
19931993-01-121993-10-15
19941994-02-221994-11-27
19951995-03-061995-11-27
19961996-01-171996-12-23
19971997-01-031997-10-12
19981998-01-041998-11-09
19991999-01-021999-11-23
20002000-02-132000-12-29
20012001-01-302001-12-23
20022002-02-012002-10-04
20032003-01-312003-11-22
20042004-02-062004-11-20
20052005-01-022005-11-29
20062006-01-032006-11-28
20072007-01-012007-12-23
20092009-03-092009-12-25
20102010-01-242010-12-12
20112011-02-212011-12-04
20122012-02-292012-12-20
20132013-02-112013-11-17
20142014-02-212014-12-23
20152015-03-252015-12-29
20162016-02-022016-12-26
20172017-01-102017-10-22
20182018-01-232018-12-02
20192019-01-012019-12-29
20202020-03-202020-11-11
20262026-01-092026-09-20

Every Fixed Threshold

Fixed thresholds at Ontario 3E
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4240199315
25 mm (0.98 in): Days with 25 mm or more rain421620164
50 mm (1.97 in): Days with 50 mm or more rain34520182
100 mm (3.94 in): Days with 100 mm or more rain5119791
200 mm (7.87 in): Days with 200 mm or more rain1120181
10 cm (3.9 in): Days with 10 cm or more snowfall37820072
25 cm (9.8 in): Days with 25 cm or more snowfall6119831

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1979.

Download the Data

  • Data for Ontario 3E 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 (2026-10-12).