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

Isabel Threshold Days by Year (USC00394268)

4 fixed thresholds counted per year at Isabel (USC00394268): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Isabel Thresholds

  • Isabel: days with 10 mm (0.39 in) or more of precipitation in 11 years, most in 2009 with 17.
  • Isabel: days with 25 mm (0.98 in) or more of precipitation in 9 years, most in 2008 with 6.
  • Isabel: days with 50 mm (1.97 in) or more of precipitation in 3 years, most in 2004 with 2.
  • Isabel: days with 10 cm (3.9 in) or more of snowfall in 2 years, most in 2003 with 1.
  • 4 fixed thresholds have at least one qualifying day at Isabel.
11 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Isabel Days per year at Isabel with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 2009. 051015201949: 61950: 32000: 132001: 132002: 32003: 152004: 142005: 102006: 62008: 152009: 17194920002002200420062009
Days per year at Isabel with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 2009.
Days with 10 mm (0.39 in) or more of precipitation per year at Isabel
YearDaysDecade average
194966
195033
20001311.8
20011311.8
2002311.8
20031511.8
20041411.8
20051011.8
2006611.8
20081511.8
20091711.8
First to last qualifying date each year at Isabel For each year, a bar from the first to the last day at Isabel meeting 10 mm (0.39 in). 1949: 30 April 1949 to 10 October 19491950: 10 July 1950 to 20 September 19502000: 26 February 2000 to 18 July 20002001: 3 April 2001 to 10 October 20012002: 23 June 2002 to 9 August 20022003: 18 March 2003 to 29 October 20032004: 1 March 2004 to 31 October 20042005: 22 March 2005 to 15 October 20052006: 20 March 2006 to 23 September 20062008: 2 May 2008 to 6 November 20082009: 10 February 2009 to 29 October 2009194920002002200420062009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Isabel meeting 10 mm (0.39 in).
First to last qualifying date each year at Isabel
YearFirst dateLast date
19491949-04-301949-10-10
19501950-07-101950-09-20
20002000-02-262000-07-18
20012001-04-032001-10-10
20022002-06-232002-08-09
20032003-03-182003-10-29
20042004-03-012004-10-31
20052005-03-222005-10-15
20062006-03-202006-09-23
20082008-05-022008-11-06
20092009-02-102009-10-29

Every Fixed Threshold

Fixed thresholds at Isabel
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1117200917
25 mm (0.98 in): Days with 25 mm or more rain9620081
50 mm (1.97 in): Days with 50 mm or more rain3220041
10 cm (3.9 in): Days with 10 cm or more snowfall2120031

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

Download the Data

  • Data for Isabel 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).