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Built 2026-10-19 (19 October 2026)

Willow Threshold Days by Year (USC00349668)

5 fixed thresholds counted per year at Willow (USC00349668): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Willow Thresholds

  • Willow: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 2015 with 34.
  • Willow: days with 25 mm (0.98 in) or more of precipitation in 44 years, most in 1995 with 16.
  • Willow: days with 50 mm (1.97 in) or more of precipitation in 39 years, most in 1986 with 7.
  • Willow: days with 10 cm (3.9 in) or more of snowfall in 11 years, most in 1983 with 2.
  • 5 fixed thresholds have at least one qualifying day at Willow.
44 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Willow Days per year at Willow with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 34 in 2015. 0102030401981: 251982: 241983: 231984: 141985: 211986: 291987: 291988: 201989: 251990: 281991: 281992: 241993: 301994: 271995: 271996: 261997: 281998: 211999: 242000: 222003: 132004: 262005: 222006: 242007: 292008: 192009: 222010: 162011: 122012: 152013: 192014: 182015: 342016: 252017: 242018: 262019: 182020: 172021: 172022: 202023: 202024: 142025: 182026: 15198119861991199620032008201320182023
Days per year at Willow with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 34 in 2015.
Days with 10 mm (0.39 in) or more of precipitation per year at Willow
YearDaysDecade average
19812523.3
19822423.3
19832323.3
19841423.3
19852123.3
19862923.3
19872923.3
19882023.3
19892523.3
19902826.3
19912826.3
19922426.3
19933026.3
19942726.3
19952726.3
19962626.3
19972826.3
19982126.3
19992426.3
20002222.1
20031322.1
20042622.1
20052222.1
20062422.1
20072922.1
20081922.1
20092222.1
20101620.7
20111220.7
20121520.7
20131920.7
20141820.7
20153420.7
20162520.7
20172420.7
20182620.7
20191820.7
20201717.3
20211717.3
20222017.3
20232017.3
20241417.3
20251817.3
20261517.3
First to last qualifying date each year at Willow For each year, a bar from the first to the last day at Willow meeting 10 mm (0.39 in). 1981: 15 March 1981 to 30 November 19811982: 30 January 1982 to 27 December 19821983: 2 January 1983 to 23 November 19831984: 9 February 1984 to 16 December 19841985: 1 January 1985 to 15 November 19851986: 8 February 1986 to 9 December 19861987: 9 January 1987 to 26 December 19871988: 6 January 1988 to 20 November 19881989: 25 January 1989 to 6 October 19891990: 18 January 1990 to 8 November 19901991: 10 January 1991 to 22 December 19911992: 27 January 1992 to 14 December 19921993: 1 January 1993 to 13 December 19931994: 22 February 1994 to 20 November 19941995: 22 January 1995 to 18 December 19951996: 26 February 1996 to 1 December 19961997: 7 February 1997 to 24 December 19971998: 31 January 1998 to 30 November 19981999: 29 January 1999 to 5 December 19992000: 25 February 2000 to 26 December 20002003: 16 April 2003 to 11 September 20032004: 16 January 2004 to 7 December 20042005: 5 January 2005 to 20 October 20052006: 19 March 2006 to 30 December 20062007: 20 January 2007 to 12 December 20072008: 16 February 2008 to 15 October 20082009: 9 February 2009 to 29 October 20092010: 29 January 2010 to 13 November 20102011: 12 May 2011 to 20 December 20112012: 13 February 2012 to 31 December 20122013: 10 January 2013 to 21 December 20132014: 21 April 2014 to 4 November 20142015: 22 January 2015 to 27 December 20152016: 8 March 2016 to 3 December 20162017: 15 January 2017 to 7 October 20172018: 17 February 2018 to 27 December 20182019: 13 March 2019 to 28 December 20192020: 17 January 2020 to 30 December 20202021: 1 January 2021 to 13 October 20212022: 17 February 2022 to 27 November 20222023: 9 February 2023 to 24 December 20232024: 5 January 2024 to 18 November 20242025: 3 March 2025 to 26 August 20252026: 25 January 2026 to 15 October 202619811987199319992007201320192025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Willow meeting 10 mm (0.39 in).
First to last qualifying date each year at Willow
YearFirst dateLast date
19811981-03-151981-11-30
19821982-01-301982-12-27
19831983-01-021983-11-23
19841984-02-091984-12-16
19851985-01-011985-11-15
19861986-02-081986-12-09
19871987-01-091987-12-26
19881988-01-061988-11-20
19891989-01-251989-10-06
19901990-01-181990-11-08
19911991-01-101991-12-22
19921992-01-271992-12-14
19931993-01-011993-12-13
19941994-02-221994-11-20
19951995-01-221995-12-18
19961996-02-261996-12-01
19971997-02-071997-12-24
19981998-01-311998-11-30
19991999-01-291999-12-05
20002000-02-252000-12-26
20032003-04-162003-09-11
20042004-01-162004-12-07
20052005-01-052005-10-20
20062006-03-192006-12-30
20072007-01-202007-12-12
20082008-02-162008-10-15
20092009-02-092009-10-29
20102010-01-292010-11-13
20112011-05-122011-12-20
20122012-02-132012-12-31
20132013-01-102013-12-21
20142014-04-212014-11-04
20152015-01-222015-12-27
20162016-03-082016-12-03
20172017-01-152017-10-07
20182018-02-172018-12-27
20192019-03-132019-12-28
20202020-01-172020-12-30
20212021-01-012021-10-13
20222022-02-172022-11-27
20232023-02-092023-12-24
20242024-01-052024-11-18
20252025-03-032025-08-26
20262026-01-252026-10-15

Every Fixed Threshold

Fixed thresholds at Willow
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4434201515
25 mm (0.98 in): Days with 25 mm or more rain441619954
50 mm (1.97 in): Days with 50 mm or more rain39719862
100 mm (3.94 in): Days with 100 mm or more rain9219861
10 cm (3.9 in): Days with 10 cm or more snowfall11219831

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1981.

Download the Data

  • Data for Willow 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 (2026-10-17).