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Data as of 2026-10-12
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Built 2026-10-17 (17 October 2026)

Seneca Threshold Days by Year

15 fixed thresholds counted per year at Seneca (USC00237656): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Seneca Thresholds

  • Seneca: days with 10 mm (0.39 in) or more of precipitation in 22 years, most in 2019 with 58.
  • Seneca: days with 25 mm (0.98 in) or more of precipitation in 22 years, most in 2019 with 28.
  • Seneca: days with 50 mm (1.97 in) or more of precipitation in 22 years, most in 2019 with 10.
  • Seneca: days with 10 cm (3.9 in) or more of snowfall in 9 years, most in 1989 with 1.
  • 15 fixed thresholds have at least one qualifying day at Seneca.
3 years with a qualifying day
Days at or above 30 C (86 F) per year at Seneca Days per year at Seneca with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 2010. 0501001502008: 632009: 592010: 105200820092010
Days per year at Seneca with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 2010.
Days at or above 30 C (86 F) per year at Seneca
YearDaysDecade average
20086361
20095961
2010105105
First to last qualifying date each year at Seneca For each year, a bar from the first to the last day at Seneca meeting 30 C (86 F). 2008: 20 May 2008 to 13 September 20082009: 23 April 2009 to 28 September 20092010: 7 May 2010 to 23 September 2010200820092010JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Seneca meeting 30 C (86 F).
First to last qualifying date each year at Seneca
YearFirst dateLast date
20082008-05-202008-09-13
20092009-04-232009-09-28
20102010-05-072010-09-23

Every Fixed Threshold

Fixed thresholds at Seneca
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days31052010105
35 C (95 F): Days328201028
90 F (32.2 C): Days374201074
100 F (37.8 C): Days211201011
0 C (32 F): Ice days (max313201013
0 C (32 F): Frost days (min286200986
-10 C (14 F): Days with min215201015
20 C (68 F): Tropical nights (min283201083
25 C (77 F): Days with min1220102
10 mm (0.39 in): Days with 10 mm or more rain2258201913
25 mm (0.98 in): Days with 25 mm or more rain222820195
50 mm (1.97 in): Days with 50 mm or more rain221020192
100 mm (3.94 in): Days with 100 mm or more rain8219971
10 cm (3.9 in): Days with 10 cm or more snowfall9119891
25 cm (9.8 in): Days with 25 cm or more snowfall2119891

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2008.

Download the Data

  • Data for Seneca 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-12).