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

Flatiron Rsvr Threshold Days by Year (USC00052934)

5 fixed thresholds counted per year at Flatiron Rsvr (USC00052934): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Flatiron Rsvr Thresholds

  • Flatiron Rsvr: days with 10 cm (3.9 in) or more of snowfall in 22 years, most in 1997 with 7.
  • Flatiron Rsvr: days with 10 mm (0.39 in) or more of precipitation in 10 years, most in 1999 with 17.
  • Flatiron Rsvr: days with 25 mm (0.98 in) or more of precipitation in 10 years, most in 1997 with 7.
  • Flatiron Rsvr: days with 25 cm (9.8 in) or more of snowfall in 7 years, most in 2020 with 2.
  • 5 fixed thresholds have at least one qualifying day at Flatiron Rsvr.
10 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Flatiron Rsvr Days per year at Flatiron Rsvr with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 1999. 051015201997: 121998: 151999: 172000: 62001: 112002: 92003: 122004: 172005: 102025: 61997199819992000200120022003200420052025
Days per year at Flatiron Rsvr with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 1999.
Days with 10 mm (0.39 in) or more of precipitation per year at Flatiron Rsvr
YearDaysDecade average
19971214.7
19981514.7
19991714.7
2000610.8
20011110.8
2002910.8
20031210.8
20041710.8
20051010.8
202566
First to last qualifying date each year at Flatiron Rsvr For each year, a bar from the first to the last day at Flatiron Rsvr meeting 10 mm (0.39 in). 1997: 25 April 1997 to 27 October 19971998: 18 March 1998 to 9 November 19981999: 22 April 1999 to 22 November 19992000: 16 March 2000 to 24 September 20002001: 11 April 2001 to 8 November 20012002: 13 May 2002 to 3 October 20022003: 18 March 2003 to 31 August 20032004: 5 March 2004 to 29 November 20042005: 31 January 2005 to 11 October 20052025: 7 May 2025 to 3 December 202519971999200120032005JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Flatiron Rsvr meeting 10 mm (0.39 in).
First to last qualifying date each year at Flatiron Rsvr
YearFirst dateLast date
19971997-04-251997-10-27
19981998-03-181998-11-09
19991999-04-221999-11-22
20002000-03-162000-09-24
20012001-04-112001-11-08
20022002-05-132002-10-03
20032003-03-182003-08-31
20042004-03-052004-11-29
20052005-01-312005-10-11
20252025-05-072025-12-03

Every Fixed Threshold

Fixed thresholds at Flatiron Rsvr
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain101719996
25 mm (0.98 in): Days with 25 mm or more rain10719971
50 mm (1.97 in): Days with 50 mm or more rain4219972
10 cm (3.9 in): Days with 10 cm or more snowfall22719972
25 cm (9.8 in): Days with 25 cm or more snowfall7220201

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.

Download the Data

  • Data for Flatiron Rsvr 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).