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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Willis Threshold Days by Year (USC00449169)

7 fixed thresholds counted per year at Willis (USC00449169): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willis Thresholds

  • Willis: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 2009 with 49.
  • Willis: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1989 with 19.
  • Willis: days with 10 cm (3.9 in) or more of snowfall in 27 years, most in 1987 with 10.
  • Willis: days with 50 mm (1.97 in) or more of precipitation in 26 years, most in 1989 with 9.
  • 7 fixed thresholds have at least one qualifying day at Willis.
34 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Willis Days per year at Willis with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 2009. 02040601980: 261981: 381982: 411983: 411984: 361985: 381986: 331988: 321989: 481990: 391991: 321992: 361993: 461994: 401995: 351998: 341999: 322000: 302001: 242002: 392004: 372005: 322006: 352007: 302008: 222009: 492010: 322011: 422012: 332013: 472014: 322015: 432016: 362017: 32198019841989199319992004200820122016
Days per year at Willis with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 2009.
Days with 10 mm (0.39 in) or more of precipitation per year at Willis
YearDaysDecade average
19802637
19813837
19824137
19834137
19843637
19853837
19863337
19883237
19894837
19903936.8
19913236.8
19923636.8
19934636.8
19944036.8
19953536.8
19983436.8
19993236.8
20003033.1
20012433.1
20023933.1
20043733.1
20053233.1
20063533.1
20073033.1
20082233.1
20094933.1
20103237.1
20114237.1
20123337.1
20134737.1
20143237.1
20154337.1
20163637.1
20173237.1
First to last qualifying date each year at Willis For each year, a bar from the first to the last day at Willis meeting 10 mm (0.39 in). 1980: 2 March 1980 to 30 December 19801981: 2 February 1981 to 25 December 19811982: 1 January 1982 to 16 December 19821983: 3 February 1983 to 29 December 19831984: 11 January 1984 to 6 December 19841985: 3 January 1985 to 13 December 19851986: 20 January 1986 to 25 December 19861988: 7 January 1988 to 28 November 19881989: 1 January 1989 to 13 December 19891990: 1 January 1990 to 28 December 19901991: 11 January 1991 to 29 December 19911992: 4 January 1992 to 28 December 19921993: 5 January 1993 to 21 December 19931994: 4 January 1994 to 11 December 19941995: 1 January 1995 to 29 November 19951998: 8 January 1998 to 24 December 19981999: 3 January 1999 to 14 December 19992000: 10 January 2000 to 17 December 20002001: 19 January 2001 to 15 October 20012002: 20 January 2002 to 26 December 20022004: 6 January 2004 to 24 December 20042005: 8 January 2005 to 16 December 20052006: 14 January 2006 to 26 December 20062007: 1 January 2007 to 31 December 20072008: 1 February 2008 to 21 December 20082009: 6 January 2009 to 26 December 20092010: 17 January 2010 to 17 December 20102011: 25 February 2011 to 23 December 20112012: 12 January 2012 to 27 December 20122013: 16 January 2013 to 30 December 20132014: 11 January 2014 to 24 December 20142015: 24 January 2015 to 29 December 20152016: 10 January 2016 to 7 December 20162017: 7 January 2017 to 29 October 20171980198519911998200420092014JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Willis meeting 10 mm (0.39 in).
First to last qualifying date each year at Willis
YearFirst dateLast date
19801980-03-021980-12-30
19811981-02-021981-12-25
19821982-01-011982-12-16
19831983-02-031983-12-29
19841984-01-111984-12-06
19851985-01-031985-12-13
19861986-01-201986-12-25
19881988-01-071988-11-28
19891989-01-011989-12-13
19901990-01-011990-12-28
19911991-01-111991-12-29
19921992-01-041992-12-28
19931993-01-051993-12-21
19941994-01-041994-12-11
19951995-01-011995-11-29
19981998-01-081998-12-24
19991999-01-031999-12-14
20002000-01-102000-12-17
20012001-01-192001-10-15
20022002-01-202002-12-26
20042004-01-062004-12-24
20052005-01-082005-12-16
20062006-01-142006-12-26
20072007-01-012007-12-31
20082008-02-012008-12-21
20092009-01-062009-12-26
20102010-01-172010-12-17
20112011-02-252011-12-23
20122012-01-122012-12-27
20132013-01-162013-12-30
20142014-01-112014-12-24
20152015-01-242015-12-29
20162016-01-102016-12-07
20172017-01-072017-10-29

Every Fixed Threshold

Fixed thresholds at Willis
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3449200932
25 mm (0.98 in): Days with 25 mm or more rain3419198913
50 mm (1.97 in): Days with 50 mm or more rain26919893
100 mm (3.94 in): Days with 100 mm or more rain5220132
10 cm (3.9 in): Days with 10 cm or more snowfall271019871
25 cm (9.8 in): Days with 25 cm or more snowfall5219932
50 cm (19.7 in): Days with 50 cm or more snowfall1119981

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1980.

Download the Data

  • Data for Willis 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).