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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Jamestown (Wylmhurst) Threshold Days by Year

2 fixed thresholds counted per year at Jamestown (Wylmhurst) (ASN00021098): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jamestown (Wylmhurst) Thresholds

  • Jamestown (Wylmhurst): days with 10 mm (0.39 in) or more of precipitation in 8 years, most in 1917 with 31.
  • Jamestown (Wylmhurst): days with 25 mm (0.98 in) or more of precipitation in 8 years, most in 1917 with 6.
  • 2 fixed thresholds have at least one qualifying day at Jamestown (Wylmhurst).
8 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Jamestown (Wylmhurst) Days per year at Jamestown (Wylmhurst) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1917. 0102030401913: 121914: 61915: 161916: 241917: 311918: 131919: 151920: 2319131914191519161917191819191920
Days per year at Jamestown (Wylmhurst) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 31 in 1917.
Days with 10 mm (0.39 in) or more of precipitation per year at Jamestown (Wylmhurst)
YearDaysDecade average
19131216.7
1914616.7
19151616.7
19162416.7
19173116.7
19181316.7
19191516.7
19202323
First to last qualifying date each year at Jamestown (Wylmhurst) For each year, a bar from the first to the last day at Jamestown (Wylmhurst) meeting 10 mm (0.39 in). 1913: 12 March 1913 to 22 December 19131914: 8 March 1914 to 17 November 19141915: 8 April 1915 to 28 December 19151916: 13 May 1916 to 8 December 19161917: 1 January 1917 to 11 December 19171918: 18 February 1918 to 4 October 19181919: 16 February 1919 to 27 December 19191920: 12 April 1920 to 27 December 192019131914191519161917191819191920JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Jamestown (Wylmhurst) meeting 10 mm (0.39 in).
First to last qualifying date each year at Jamestown (Wylmhurst)
YearFirst dateLast date
19131913-03-121913-12-22
19141914-03-081914-11-17
19151915-04-081915-12-28
19161916-05-131916-12-08
19171917-01-011917-12-11
19181918-02-181918-10-04
19191919-02-161919-12-27
19201920-04-121920-12-27

Every Fixed Threshold

Fixed thresholds at Jamestown (Wylmhurst)
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain831191723
25 mm (0.98 in): Days with 25 mm or more rain8619172

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1913.

Download the Data

  • Data for Jamestown (Wylmhurst) 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).