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

Jamestown Threshold Days by Year (USC00404590)

15 fixed thresholds counted per year at Jamestown (USC00404590): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Jamestown Thresholds

  • Jamestown: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 2019 with 64.
  • Jamestown: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 2020 with 23.
  • Jamestown: days with 50 mm (1.97 in) or more of precipitation in 64 years, most in 2011 with 11.
  • Jamestown: days with 10 cm (3.9 in) or more of snowfall in 29 years, most in 1996 with 7.
  • 15 fixed thresholds have at least one qualifying day at Jamestown.
19 years with a qualifying day
Days at or above 30 C (86 F) per year at Jamestown Days per year at Jamestown with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 2019. 0204060802004: 92005: 422006: 492007: 622008: 422009: 122010: 652011: 502012: 492013: 132014: 212016: 592018: 492019: 762020: 352021: 292024: 332025: 482026: 332004200620082010201220142018202020242026
Days per year at Jamestown with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 76 in 2019.
Days at or above 30 C (86 F) per year at Jamestown
YearDaysDecade average
2004936
20054236
20064936
20076236
20084236
20091236
20106547.8
20115047.8
20124947.8
20131347.8
20142147.8
20165947.8
20184947.8
20197647.8
20203535.6
20212935.6
20243335.6
20254835.6
20263335.6
First to last qualifying date each year at Jamestown For each year, a bar from the first to the last day at Jamestown meeting 30 C (86 F). 2004: 16 June 2004 to 6 September 20042005: 5 June 2005 to 21 September 20052006: 27 May 2006 to 30 August 20062007: 29 May 2007 to 8 October 20072008: 4 June 2008 to 8 September 20082009: 20 June 2009 to 16 August 20092010: 7 April 2010 to 25 September 20102011: 11 April 2011 to 4 September 20112012: 26 May 2012 to 8 September 20122013: 27 June 2013 to 11 September 20132014: 17 June 2014 to 7 September 20142016: 2 June 2016 to 20 October 20162018: 14 May 2018 to 21 September 20182019: 23 May 2019 to 6 October 20192020: 8 June 2020 to 13 September 20202021: 14 June 2021 to 31 August 20212024: 2 July 2024 to 23 September 20242025: 23 June 2025 to 16 September 20252026: 19 May 2026 to 31 August 20262004200720102013201820212026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Jamestown meeting 30 C (86 F).
First to last qualifying date each year at Jamestown
YearFirst dateLast date
20042004-06-162004-09-06
20052005-06-052005-09-21
20062006-05-272006-08-30
20072007-05-292007-10-08
20082008-06-042008-09-08
20092009-06-202009-08-16
20102010-04-072010-09-25
20112011-04-112011-09-04
20122012-05-262012-09-08
20132013-06-272013-09-11
20142014-06-172014-09-07
20162016-06-022016-10-20
20182018-05-142018-09-21
20192019-05-232019-10-06
20202020-06-082020-09-13
20212021-06-142021-08-31
20242024-07-022024-09-23
20252025-06-232025-09-16
20262026-05-192026-08-31

Every Fixed Threshold

Fixed thresholds at Jamestown
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1976201933
35 C (95 F): Days3920129
90 F (32.2 C): Days152520078
100 F (37.8 C): Days2220072
0 C (32 F): Ice days (max1939201012
0 C (32 F): Frost days (min18120201349
-10 C (14 F): Days with min182620109
-20 C (-4 F): Days with min2520141
20 C (68 F): Tropical nights (min1839201023
10 mm (0.39 in): Days with 10 mm or more rain6864201930
25 mm (0.98 in): Days with 25 mm or more rain6823202018
50 mm (1.97 in): Days with 50 mm or more rain641120114
100 mm (3.94 in): Days with 100 mm or more rain10119551
10 cm (3.9 in): Days with 10 cm or more snowfall29719962
25 cm (9.8 in): Days with 25 cm or more snowfall5119661

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2004.

Download the Data

  • Data for Jamestown 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 (2026-10-12).