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

Islay Plains Threshold Days by Year (ASN00035275)

4 fixed thresholds counted per year at Islay Plains (ASN00035275): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Islay Plains Thresholds

  • Islay Plains: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 1989 with 27.
  • Islay Plains: days with 25 mm (0.98 in) or more of precipitation in 21 years, most in 1989 with 11.
  • Islay Plains: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1989 with 3.
  • Islay Plains: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1992 with 1.
  • 4 fixed thresholds have at least one qualifying day at Islay Plains.
21 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Islay Plains Days per year at Islay Plains with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 27 in 1989. 01020301989: 271990: 191991: 201992: 141993: 101994: 111995: 191996: 171997: 191998: 181999: 192000: 252001: 132002: 112016: 162017: 122018: 52019: 102020: 142021: 172025: 201989199219951998200120172020
Days per year at Islay Plains with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 27 in 1989.
Days with 10 mm (0.39 in) or more of precipitation per year at Islay Plains
YearDaysDecade average
19892727
19901916.6
19912016.6
19921416.6
19931016.6
19941116.6
19951916.6
19961716.6
19971916.6
19981816.6
19991916.6
20002516.3
20011316.3
20021116.3
20161610.8
20171210.8
2018510.8
20191010.8
20201417
20211717
20252017
First to last qualifying date each year at Islay Plains For each year, a bar from the first to the last day at Islay Plains meeting 10 mm (0.39 in). 1989: 6 January 1989 to 15 December 19891990: 16 January 1990 to 28 December 19901991: 5 January 1991 to 12 December 19911992: 4 January 1992 to 19 December 19921993: 6 January 1993 to 24 November 19931994: 2 February 1994 to 4 December 19941995: 3 January 1995 to 5 December 19951996: 2 January 1996 to 19 December 19961997: 26 January 1997 to 21 December 19971998: 11 January 1998 to 30 December 19981999: 2 January 1999 to 18 December 19992000: 10 January 2000 to 28 December 20002001: 11 January 2001 to 17 December 20012002: 9 January 2002 to 21 December 20022016: 4 January 2016 to 11 December 20162017: 4 January 2017 to 28 December 20172018: 5 January 2018 to 13 December 20182019: 16 March 2019 to 31 October 20192020: 18 January 2020 to 30 December 20202021: 7 January 2021 to 27 December 20212025: 2 January 2025 to 26 December 20251989199219951998200120172020JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Islay Plains meeting 10 mm (0.39 in).
First to last qualifying date each year at Islay Plains
YearFirst dateLast date
19891989-01-061989-12-15
19901990-01-161990-12-28
19911991-01-051991-12-12
19921992-01-041992-12-19
19931993-01-061993-11-24
19941994-02-021994-12-04
19951995-01-031995-12-05
19961996-01-021996-12-19
19971997-01-261997-12-21
19981998-01-111998-12-30
19991999-01-021999-12-18
20002000-01-102000-12-28
20012001-01-112001-12-17
20022002-01-092002-12-21
20162016-01-042016-12-11
20172017-01-042017-12-28
20182018-01-052018-12-13
20192019-03-162019-10-31
20202020-01-182020-12-30
20212021-01-072021-12-27
20252025-01-022025-12-26

Every Fixed Threshold

Fixed thresholds at Islay Plains
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2127198920
25 mm (0.98 in): Days with 25 mm or more rain211119897
50 mm (1.97 in): Days with 50 mm or more rain16319891
100 mm (3.94 in): Days with 100 mm or more rain2119921

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1989.

Download the Data

  • Data for Islay Plains 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).