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Data as of 2026-10-12
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Built 2026-10-16 (16 October 2026)

Olean Threshold Days by Year

16 fixed thresholds counted per year at Olean (USC00306196): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Olean Thresholds

  • Olean: days with 10 mm (0.39 in) or more of precipitation in 110 years, most in 1990 with 53.
  • Olean: days with 25 mm (0.98 in) or more of precipitation in 109 years, most in 2003 with 12.
  • Olean: days with 10 cm (3.9 in) or more of snowfall in 74 years, most in 1960 with 8.
  • Olean: days with 50 mm (1.97 in) or more of precipitation in 53 years, most in 1972 with 4.
  • 16 fixed thresholds have at least one qualifying day at Olean.
16 years with a qualifying day
Days at or above 30 C (86 F) per year at Olean Days per year at Olean with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 2016. 01020302011: 202012: 232013: 142014: 62015: 162016: 252017: 82018: 232019: 132020: 242021: 182022: 182023: 92024: 142025: 232026: 1120112013201520172019202120232025
Days per year at Olean with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 2016.
Days at or above 30 C (86 F) per year at Olean
YearDaysDecade average
20112016.4
20122316.4
20131416.4
2014616.4
20151616.4
20162516.4
2017816.4
20182316.4
20191316.4
20202416.7
20211816.7
20221816.7
2023916.7
20241416.7
20252316.7
20261116.7
First to last qualifying date each year at Olean For each year, a bar from the first to the last day at Olean meeting 30 C (86 F). 2011: 31 May 2011 to 4 September 20112012: 4 May 2012 to 1 September 20122013: 22 May 2013 to 12 September 20132014: 14 May 2014 to 6 September 20142015: 10 May 2015 to 9 September 20152016: 28 May 2016 to 9 September 20162017: 13 June 2017 to 28 September 20172018: 29 May 2018 to 22 September 20182019: 20 May 2019 to 2 October 20192020: 26 May 2020 to 10 September 20202021: 21 May 2021 to 29 August 20212022: 25 April 2022 to 30 August 20222023: 15 April 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 202620112013201520172019202120232025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Olean meeting 30 C (86 F).
First to last qualifying date each year at Olean
YearFirst dateLast date
20112011-05-312011-09-04
20122012-05-042012-09-01
20132013-05-222013-09-12
20142014-05-142014-09-06
20152015-05-102015-09-09
20162016-05-282016-09-09
20172017-06-132017-09-28
20182018-05-292018-09-22
20192019-05-202019-10-02
20202020-05-262020-09-10
20212021-05-212021-08-29
20222022-04-252022-08-30
20232023-04-152023-09-07
20242024-06-182024-08-28
20252025-06-052025-08-17
20262026-05-192026-09-02

Every Fixed Threshold

Fixed thresholds at Olean
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1625201611
35 C (95 F): Days1220112
90 F (32.2 C): Days11920115
0 C (32 F): Ice days (max1665201442
0 C (32 F): Frost days (min16173201894
-10 C (14 F): Days with min1663201530
-20 C (-4 F): Days with min1523201511
-30 C (-22 F): Days with min1220222
20 C (68 F): Tropical nights (min12720184
10 mm (0.39 in): Days with 10 mm or more rain11053199027
25 mm (0.98 in): Days with 25 mm or more rain1091220034
50 mm (1.97 in): Days with 50 mm or more rain53419722
100 mm (3.94 in): Days with 100 mm or more rain2120241
10 cm (3.9 in): Days with 10 cm or more snowfall74819602
25 cm (9.8 in): Days with 25 cm or more snowfall18219611
50 cm (19.7 in): Days with 50 cm or more snowfall1119781

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2011.

Download the Data

  • Data for Olean 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 (2026-10-12).