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

Flat Threshold Days by Year (USC00413171)

4 fixed thresholds counted per year at Flat (USC00413171): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Flat Thresholds

  • Flat: days with 10 mm (0.39 in) or more of precipitation in 15 years, most in 2004 with 37.
  • Flat: days with 25 mm (0.98 in) or more of precipitation in 15 years, most in 2004 with 18.
  • Flat: days with 50 mm (1.97 in) or more of precipitation in 14 years, most in 2004 with 6.
  • Flat: days with 100 mm (3.94 in) or more of precipitation in 4 years, most in 1997 with 1.
  • 4 fixed thresholds have at least one qualifying day at Flat.
15 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Flat Days per year at Flat with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 2004. 0102030401992: 331993: 301994: 331995: 211996: 241997: 351998: 301999: 202000: 262001: 302002: 232003: 172004: 372005: 242006: 2219921994199619982000200220042006
Days per year at Flat with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 2004.
Days with 10 mm (0.39 in) or more of precipitation per year at Flat
YearDaysDecade average
19923328.3
19933028.3
19943328.3
19952128.3
19962428.3
19973528.3
19983028.3
19992028.3
20002625.6
20013025.6
20022325.6
20031725.6
20043725.6
20052425.6
20062225.6
First to last qualifying date each year at Flat For each year, a bar from the first to the last day at Flat meeting 10 mm (0.39 in). 1992: 18 January 1992 to 15 December 19921993: 20 January 1993 to 22 December 19931994: 13 January 1994 to 29 December 19941995: 26 February 1995 to 18 December 19951996: 28 March 1996 to 15 December 19961997: 7 January 1997 to 21 December 19971998: 5 January 1998 to 11 December 19981999: 29 January 1999 to 12 December 19992000: 8 January 2000 to 26 December 20002001: 1 January 2001 to 17 December 20012002: 31 January 2002 to 23 December 20022003: 15 February 2003 to 13 December 20032004: 25 January 2004 to 24 November 20042005: 3 January 2005 to 20 November 20052006: 29 January 2006 to 25 December 200619921994199619982000200220042006JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Flat meeting 10 mm (0.39 in).
First to last qualifying date each year at Flat
YearFirst dateLast date
19921992-01-181992-12-15
19931993-01-201993-12-22
19941994-01-131994-12-29
19951995-02-261995-12-18
19961996-03-281996-12-15
19971997-01-071997-12-21
19981998-01-051998-12-11
19991999-01-291999-12-12
20002000-01-082000-12-26
20012001-01-012001-12-17
20022002-01-312002-12-23
20032003-02-152003-12-13
20042004-01-252004-11-24
20052005-01-032005-11-20
20062006-01-292006-12-25

Every Fixed Threshold

Fixed thresholds at Flat
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1537200422
25 mm (0.98 in): Days with 25 mm or more rain151820049
50 mm (1.97 in): Days with 50 mm or more rain14620042
100 mm (3.94 in): Days with 100 mm or more rain4119971

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1992.

Download the Data

  • Data for Flat 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).