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

Channel Island Threshold Days by Year (ASN00014009)

5 fixed thresholds counted per year at Channel Island (ASN00014009): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Channel Island Thresholds

  • Channel Island: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1999 with 71.
  • Channel Island: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 2000 with 33.
  • Channel Island: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1997 with 16.
  • Channel Island: days with 100 mm (3.94 in) or more of precipitation in 15 years, most in 1997 with 5.
  • 5 fixed thresholds have at least one qualifying day at Channel Island.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Channel Island Days per year at Channel Island with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 71 in 1999. 0204060801932: 371933: 471938: 401939: 371940: 421941: 461944: 411945: 431946: 341947: 421950: 401992: 431994: 451995: 571996: 501997: 511998: 571999: 712000: 602001: 502002: 402003: 512004: 482005: 462007: 542008: 402009: 522010: 442012: 452014: 501932193919441947199419972000200320072010
Days per year at Channel Island with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 71 in 1999.
Days with 10 mm (0.39 in) or more of precipitation per year at Channel Island
YearDaysDecade average
19323740.3
19334740.3
19384040.3
19393740.3
19404241.3
19414641.3
19444141.3
19454341.3
19463441.3
19474241.3
19504040
19924353.4
19944553.4
19955753.4
19965053.4
19975153.4
19985753.4
19997153.4
20006049
20015049
20024049
20035149
20044849
20054649
20075449
20084049
20095249
20104446.3
20124546.3
20145046.3
First to last qualifying date each year at Channel Island For each year, a bar from the first to the last day at Channel Island meeting 10 mm (0.39 in). 1932: 1 February 1932 to 29 December 19321933: 7 January 1933 to 27 December 19331938: 2 January 1938 to 31 December 19381939: 6 January 1939 to 31 December 19391940: 2 January 1940 to 21 December 19401941: 2 January 1941 to 26 December 19411944: 4 January 1944 to 31 December 19441945: 3 January 1945 to 31 December 19451946: 6 January 1946 to 19 December 19461947: 17 January 1947 to 28 December 19471950: 7 January 1950 to 17 December 19501992: 2 January 1992 to 28 December 19921994: 5 January 1994 to 31 December 19941995: 2 January 1995 to 17 December 19951996: 2 January 1996 to 30 December 19961997: 1 January 1997 to 31 December 19971998: 1 January 1998 to 29 December 19981999: 1 January 1999 to 30 December 19992000: 1 January 2000 to 25 December 20002001: 4 January 2001 to 29 December 20012002: 4 January 2002 to 26 December 20022003: 2 January 2003 to 29 December 20032004: 1 January 2004 to 31 December 20042005: 1 January 2005 to 30 December 20052007: 6 January 2007 to 30 December 20072008: 3 January 2008 to 30 December 20082009: 3 January 2009 to 23 December 20092010: 3 January 2010 to 30 December 20102012: 1 January 2012 to 29 December 20122014: 6 January 2014 to 31 December 201419321940194619941998200220072012JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Channel Island meeting 10 mm (0.39 in).
First to last qualifying date each year at Channel Island
YearFirst dateLast date
19321932-02-011932-12-29
19331933-01-071933-12-27
19381938-01-021938-12-31
19391939-01-061939-12-31
19401940-01-021940-12-21
19411941-01-021941-12-26
19441944-01-041944-12-31
19451945-01-031945-12-31
19461946-01-061946-12-19
19471947-01-171947-12-28
19501950-01-071950-12-17
19921992-01-021992-12-28
19941994-01-051994-12-31
19951995-01-021995-12-17
19961996-01-021996-12-30
19971997-01-011997-12-31
19981998-01-011998-12-29
19991999-01-011999-12-30
20002000-01-012000-12-25
20012001-01-042001-12-29
20022002-01-042002-12-26
20032003-01-022003-12-29
20042004-01-012004-12-31
20052005-01-012005-12-30
20072007-01-062007-12-30
20082008-01-032008-12-30
20092009-01-032009-12-23
20102010-01-032010-12-30
20122012-01-012012-12-29
20142014-01-062014-12-31

Every Fixed Threshold

Fixed thresholds at Channel Island
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3071199950
25 mm (0.98 in): Days with 25 mm or more rain3033200020
50 mm (1.97 in): Days with 50 mm or more rain291619977
100 mm (3.94 in): Days with 100 mm or more rain15519974
200 mm (7.87 in): Days with 200 mm or more rain5219981

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

Download the Data

  • Data for Channel Island 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).