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

Williamsville 2 S Threshold Days by Year (USC00449159)

5 fixed thresholds counted per year at Williamsville 2 S (USC00449159): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williamsville 2 S Thresholds

  • Williamsville 2 S: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1942 with 52.
  • Williamsville 2 S: days with 25 mm (0.98 in) or more of precipitation in 18 years, most in 1942 with 20.
  • Williamsville 2 S: days with 50 mm (1.97 in) or more of precipitation in 12 years, most in 1942 with 5.
  • Williamsville 2 S: days with 10 cm (3.9 in) or more of snowfall in 11 years, most in 2018 with 4.
  • 5 fixed thresholds have at least one qualifying day at Williamsville 2 S.
18 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Williamsville 2 S Days per year at Williamsville 2 S with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 52 in 1942. 02040601941: 311942: 521947: 301948: 461949: 471950: 361951: 351952: 371953: 271954: 352018: 432019: 332020: 442021: 362022: 382023: 222024: 322025: 38194119471949195119532018202020222024
Days per year at Williamsville 2 S with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 52 in 1942.
Days with 10 mm (0.39 in) or more of precipitation per year at Williamsville 2 S
YearDaysDecade average
19413141.2
19425241.2
19473041.2
19484641.2
19494741.2
19503634
19513534
19523734
19532734
19543534
20184338
20193338
20204435
20213635
20223835
20232235
20243235
20253835
First to last qualifying date each year at Williamsville 2 S For each year, a bar from the first to the last day at Williamsville 2 S meeting 10 mm (0.39 in). 1941: 15 January 1941 to 24 December 19411942: 2 January 1942 to 30 December 19421947: 16 January 1947 to 17 December 19471948: 2 January 1948 to 4 December 19481949: 5 January 1949 to 27 December 19491950: 13 January 1950 to 4 December 19501951: 4 January 1951 to 21 December 19511952: 5 January 1952 to 21 December 19521953: 3 January 1953 to 13 December 19531954: 11 January 1954 to 30 December 19542018: 13 January 2018 to 28 December 20182019: 13 January 2019 to 10 December 20192020: 25 January 2020 to 25 December 20202021: 2 January 2021 to 12 November 20212022: 2 January 2022 to 16 December 20222023: 26 January 2023 to 27 December 20232024: 7 January 2024 to 30 December 20242025: 6 January 2025 to 19 December 2025194119481951195420202023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Williamsville 2 S meeting 10 mm (0.39 in).
First to last qualifying date each year at Williamsville 2 S
YearFirst dateLast date
19411941-01-151941-12-24
19421942-01-021942-12-30
19471947-01-161947-12-17
19481948-01-021948-12-04
19491949-01-051949-12-27
19501950-01-131950-12-04
19511951-01-041951-12-21
19521952-01-051952-12-21
19531953-01-031953-12-13
19541954-01-111954-12-30
20182018-01-132018-12-28
20192019-01-132019-12-10
20202020-01-252020-12-25
20212021-01-022021-11-12
20222022-01-022022-12-16
20232023-01-262023-12-27
20242024-01-072024-12-30
20252025-01-062025-12-19

Every Fixed Threshold

Fixed thresholds at Williamsville 2 S
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1852194238
25 mm (0.98 in): Days with 25 mm or more rain1820194210
50 mm (1.97 in): Days with 50 mm or more rain12519422
10 cm (3.9 in): Days with 10 cm or more snowfall11420183
25 cm (9.8 in): Days with 25 cm or more snowfall1120251

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.

Download the Data

  • Data for Williamsville 2 S 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).