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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Wellsville Threshold Days by Year (USC00309072)

16 fixed thresholds counted per year at Wellsville (USC00309072): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wellsville Thresholds

  • Wellsville: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 2011 with 47.
  • Wellsville: days with 25 mm (0.98 in) or more of precipitation in 62 years, most in 2018 with 16.
  • Wellsville: days with 10 cm (3.9 in) or more of snowfall in 50 years, most in 1999 with 7.
  • Wellsville: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 1972 with 4.
  • 16 fixed thresholds have at least one qualifying day at Wellsville.
23 years with a qualifying day
Days at or above 30 C (86 F) per year at Wellsville Days per year at Wellsville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 2005. 0102030402004: 22005: 322006: 132007: 202008: 102009: 52010: 252011: 192012: 252013: 152014: 32015: 162016: 192017: 122018: 162019: 112020: 202021: 132022: 202023: 72024: 142025: 212026: 1220042007201020132016201920222025
Days per year at Wellsville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 2005.
Days at or above 30 C (86 F) per year at Wellsville
YearDaysDecade average
2004213.7
20053213.7
20061313.7
20072013.7
20081013.7
2009513.7
20102516.1
20111916.1
20122516.1
20131516.1
2014316.1
20151616.1
20161916.1
20171216.1
20181616.1
20191116.1
20202015.3
20211315.3
20222015.3
2023715.3
20241415.3
20252115.3
20261215.3
First to last qualifying date each year at Wellsville For each year, a bar from the first to the last day at Wellsville meeting 30 C (86 F). 2004: 10 June 2004 to 3 July 20042005: 6 June 2005 to 15 August 20052006: 30 May 2006 to 5 August 20062007: 1 June 2007 to 8 September 20072008: 7 June 2008 to 21 July 20082009: 28 April 2009 to 18 August 20092010: 27 May 2010 to 25 September 20102011: 30 May 2011 to 4 September 20112012: 4 May 2012 to 1 September 20122013: 22 May 2013 to 13 September 20132014: 2 July 2014 to 8 September 20142015: 9 May 2015 to 10 September 20152016: 29 May 2016 to 9 September 20162017: 19 May 2017 to 28 September 20172018: 29 May 2018 to 6 September 20182019: 20 May 2019 to 12 September 20192020: 27 May 2020 to 28 August 20202021: 21 May 2021 to 29 August 20212022: 22 May 2022 to 30 August 20222023: 2 June 2023 to 7 September 20232024: 18 June 2024 to 28 August 20242025: 5 June 2025 to 17 August 20252026: 19 May 2026 to 2 September 202620042007201020132016201920222025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Wellsville meeting 30 C (86 F).
First to last qualifying date each year at Wellsville
YearFirst dateLast date
20042004-06-102004-07-03
20052005-06-062005-08-15
20062006-05-302006-08-05
20072007-06-012007-09-08
20082008-06-072008-07-21
20092009-04-282009-08-18
20102010-05-272010-09-25
20112011-05-302011-09-04
20122012-05-042012-09-01
20132013-05-222013-09-13
20142014-07-022014-09-08
20152015-05-092015-09-10
20162016-05-292016-09-09
20172017-05-192017-09-28
20182018-05-292018-09-06
20192019-05-202019-09-12
20202020-05-272020-08-28
20212021-05-212021-08-29
20222022-05-222022-08-30
20232023-06-022023-09-07
20242024-06-182024-08-28
20252025-06-052025-08-17
20262026-05-192026-09-02

Every Fixed Threshold

Fixed thresholds at Wellsville
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2332200512
35 C (95 F): Days1320113
90 F (32.2 C): Days191120115
100 F (37.8 C): Days1220112
0 C (32 F): Ice days (max2374201438
0 C (32 F): Frost days (min23184201099
-10 C (14 F): Days with min2365200537
-20 C (-4 F): Days with min2227201510
-30 C (-22 F): Days with min1620156
20 C (68 F): Tropical nights (min12320054
10 mm (0.39 in): Days with 10 mm or more rain6247201134
25 mm (0.98 in): Days with 25 mm or more rain621620185
50 mm (1.97 in): Days with 50 mm or more rain31419721
100 mm (3.94 in): Days with 100 mm or more rain2119721
10 cm (3.9 in): Days with 10 cm or more snowfall50719991
25 cm (9.8 in): Days with 25 cm or more snowfall11319611

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2004.

Download the Data

  • Data for Wellsville 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 (2026-10-17).