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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

Mount Seymour Threshold Days by Year

3 fixed thresholds counted per year at Mount Seymour (ASN00093049): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mount Seymour Thresholds

  • Mount Seymour: days with 10 mm (0.39 in) or more of precipitation in 21 years, most in 2020 with 26.
  • Mount Seymour: days with 25 mm (0.98 in) or more of precipitation in 19 years, most in 2009 with 9.
  • Mount Seymour: days with 50 mm (1.97 in) or more of precipitation in 7 years, most in 1990 with 1.
  • 3 fixed thresholds have at least one qualifying day at Mount Seymour.
21 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Mount Seymour Days per year at Mount Seymour with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 2020. 01020301990: 161991: 92000: 142001: 202002: 82008: 72009: 222010: 202013: 132014: 122015: 122016: 212017: 92018: 122019: 72020: 262021: 202022: 242023: 122024: 192025: 121990200120092014201720202023
Days per year at Mount Seymour with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 2020.
Days with 10 mm (0.39 in) or more of precipitation per year at Mount Seymour
YearDaysDecade average
19901612.5
1991912.5
20001414.2
20012014.2
2002814.2
2008714.2
20092214.2
20102013.3
20131313.3
20141213.3
20151213.3
20162113.3
2017913.3
20181213.3
2019713.3
20202618.8
20212018.8
20222418.8
20231218.8
20241918.8
20251218.8
First to last qualifying date each year at Mount Seymour For each year, a bar from the first to the last day at Mount Seymour meeting 10 mm (0.39 in). 1990: 3 January 1990 to 28 December 19901991: 24 January 1991 to 5 November 19912000: 27 January 2000 to 25 December 20002001: 6 January 2001 to 21 December 20012002: 7 January 2002 to 30 November 20022008: 7 February 2008 to 14 December 20082009: 25 February 2009 to 18 December 20092010: 18 January 2010 to 21 December 20102013: 11 January 2013 to 22 November 20132014: 7 January 2014 to 26 December 20142015: 14 January 2015 to 27 December 20152016: 29 January 2016 to 29 December 20162017: 20 January 2017 to 4 December 20172018: 30 January 2018 to 23 November 20182019: 31 January 2019 to 30 November 20192020: 17 January 2020 to 28 December 20202021: 26 January 2021 to 7 December 20212022: 7 January 2022 to 14 December 20222023: 23 January 2023 to 20 December 20232024: 4 January 2024 to 1 December 20242025: 13 January 2025 to 22 December 20251990200120092014201720202023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mount Seymour meeting 10 mm (0.39 in).
First to last qualifying date each year at Mount Seymour
YearFirst dateLast date
19901990-01-031990-12-28
19911991-01-241991-11-05
20002000-01-272000-12-25
20012001-01-062001-12-21
20022002-01-072002-11-30
20082008-02-072008-12-14
20092009-02-252009-12-18
20102010-01-182010-12-21
20132013-01-112013-11-22
20142014-01-072014-12-26
20152015-01-142015-12-27
20162016-01-292016-12-29
20172017-01-202017-12-04
20182018-01-302018-11-23
20192019-01-312019-11-30
20202020-01-172020-12-28
20212021-01-262021-12-07
20222022-01-072022-12-14
20232023-01-232023-12-20
20242024-01-042024-12-01
20252025-01-132025-12-22

Every Fixed Threshold

Fixed thresholds at Mount Seymour
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2126202012
25 mm (0.98 in): Days with 25 mm or more rain19920091
50 mm (1.97 in): Days with 50 mm or more rain7119901

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1990.

Download the Data

  • Data for Mount Seymour 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).