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

Arapahoe Threshold Days by Year (USC00050304)

5 fixed thresholds counted per year at Arapahoe (USC00050304): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arapahoe Thresholds

  • Arapahoe: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1999 with 19.
  • Arapahoe: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 2017 with 8.
  • Arapahoe: days with 10 cm (3.9 in) or more of snowfall in 22 years, most in 2006 with 5.
  • Arapahoe: days with 50 mm (1.97 in) or more of precipitation in 9 years, most in 1949 with 1.
  • 5 fixed thresholds have at least one qualifying day at Arapahoe.
29 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Arapahoe Days per year at Arapahoe with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 19 in 1999. 051015201949: 181950: 121996: 161997: 171998: 111999: 192000: 112001: 142002: 102003: 132004: 192005: 152006: 182007: 122008: 132009: 192010: 142012: 82013: 122014: 112015: 182016: 102017: 172018: 162019: 172020: 62021: 72022: 92026: 41949199720002003200620092013201620192022
Days per year at Arapahoe with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 19 in 1999.
Days with 10 mm (0.39 in) or more of precipitation per year at Arapahoe
YearDaysDecade average
19491818
19501212
19961615.8
19971715.8
19981115.8
19991915.8
20001114.4
20011414.4
20021014.4
20031314.4
20041914.4
20051514.4
20061814.4
20071214.4
20081314.4
20091914.4
20101413.7
2012813.7
20131213.7
20141113.7
20151813.7
20161013.7
20171713.7
20181613.7
20191713.7
202066.5
202176.5
202296.5
202646.5
First to last qualifying date each year at Arapahoe For each year, a bar from the first to the last day at Arapahoe meeting 10 mm (0.39 in). 1949: 26 April 1949 to 9 October 19491950: 12 February 1950 to 25 September 19501996: 14 April 1996 to 16 September 19961997: 24 February 1997 to 29 November 19971998: 10 February 1998 to 2 November 19981999: 30 January 1999 to 29 September 19992000: 8 March 2000 to 29 October 20002001: 14 January 2001 to 18 September 20012002: 31 January 2002 to 30 October 20022003: 19 March 2003 to 8 July 20032004: 5 March 2004 to 11 November 20042005: 11 April 2005 to 11 October 20052006: 20 January 2006 to 30 December 20062007: 15 May 2007 to 30 September 20072008: 3 July 2008 to 11 November 20082009: 9 February 2009 to 22 October 20092010: 8 March 2010 to 23 September 20102012: 22 March 2012 to 23 August 20122013: 23 March 2013 to 13 September 20132014: 31 May 2014 to 15 December 20142015: 22 February 2015 to 31 October 20152016: 16 April 2016 to 3 September 20162017: 29 March 2017 to 7 October 20172018: 21 April 2018 to 25 October 20182019: 23 February 2019 to 28 December 20192020: 28 March 2020 to 12 July 20202021: 14 March 2021 to 4 July 20212022: 3 May 2022 to 5 October 20222026: 14 February 2026 to 28 May 202619491998200220062010201520192026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Arapahoe meeting 10 mm (0.39 in).
First to last qualifying date each year at Arapahoe
YearFirst dateLast date
19491949-04-261949-10-09
19501950-02-121950-09-25
19961996-04-141996-09-16
19971997-02-241997-11-29
19981998-02-101998-11-02
19991999-01-301999-09-29
20002000-03-082000-10-29
20012001-01-142001-09-18
20022002-01-312002-10-30
20032003-03-192003-07-08
20042004-03-052004-11-11
20052005-04-112005-10-11
20062006-01-202006-12-30
20072007-05-152007-09-30
20082008-07-032008-11-11
20092009-02-092009-10-22
20102010-03-082010-09-23
20122012-03-222012-08-23
20132013-03-232013-09-13
20142014-05-312014-12-15
20152015-02-222015-10-31
20162016-04-162016-09-03
20172017-03-292017-10-07
20182018-04-212018-10-25
20192019-02-232019-12-28
20202020-03-282020-07-12
20212021-03-142021-07-04
20222022-05-032022-10-05
20262026-02-142026-05-28

Every Fixed Threshold

Fixed thresholds at Arapahoe
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain291919994
25 mm (0.98 in): Days with 25 mm or more rain28820172
50 mm (1.97 in): Days with 50 mm or more rain9119491
10 cm (3.9 in): Days with 10 cm or more snowfall22520061
25 cm (9.8 in): Days with 25 cm or more snowfall2119971

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 Arapahoe 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).