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

Glen Allyn Threshold Days by Year (ASN00031178)

5 fixed thresholds counted per year at Glen Allyn (ASN00031178): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Glen Allyn Thresholds

  • Glen Allyn: days with 10 mm (0.39 in) or more of precipitation in 10 years, most in 1997 with 92.
  • Glen Allyn: days with 25 mm (0.98 in) or more of precipitation in 10 years, most in 2025 with 46.
  • Glen Allyn: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 2018 with 24.
  • Glen Allyn: days with 100 mm (3.94 in) or more of precipitation in 8 years, most in 2018 with 12.
  • 5 fixed thresholds have at least one qualifying day at Glen Allyn.
10 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Glen Allyn Days per year at Glen Allyn with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 92 in 1997. 02550751001990: 601991: 631992: 711993: 821994: 801996: 831997: 922018: 822022: 712025: 801990199119921993199419961997201820222025
Days per year at Glen Allyn with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 92 in 1997.
Days with 10 mm (0.39 in) or more of precipitation per year at Glen Allyn
YearDaysDecade average
19906075.9
19916375.9
19927175.9
19938275.9
19948075.9
19968375.9
19979275.9
20188282
20227175.5
20258075.5
First to last qualifying date each year at Glen Allyn For each year, a bar from the first to the last day at Glen Allyn meeting 10 mm (0.39 in). 1990: 16 January 1990 to 24 December 19901991: 1 January 1991 to 20 December 19911992: 6 January 1992 to 28 December 19921993: 6 January 1993 to 31 December 19931994: 11 January 1994 to 25 December 19941996: 14 January 1996 to 28 December 19961997: 3 January 1997 to 31 December 19972018: 5 January 2018 to 31 December 20182022: 3 January 2022 to 28 December 20222025: 3 January 2025 to 31 December 202519901992199419972022JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Glen Allyn meeting 10 mm (0.39 in).
First to last qualifying date each year at Glen Allyn
YearFirst dateLast date
19901990-01-161990-12-24
19911991-01-011991-12-20
19921992-01-061992-12-28
19931993-01-061993-12-31
19941994-01-111994-12-25
19961996-01-141996-12-28
19971997-01-031997-12-31
20182018-01-052018-12-31
20222022-01-032022-12-28
20252025-01-032025-12-31

Every Fixed Threshold

Fixed thresholds at Glen Allyn
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1092199780
25 mm (0.98 in): Days with 25 mm or more rain1046202546
50 mm (1.97 in): Days with 50 mm or more rain1024201814
100 mm (3.94 in): Days with 100 mm or more rain81220184
200 mm (7.87 in): Days with 200 mm or more rain3220182

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 Glen Allyn 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).