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Built 2026-10-19 (19 October 2026)

Valley NWS Threshold Days by Year

18 fixed thresholds counted per year at Valley NWS (USC00258795): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Valley NWS Thresholds

  • Valley NWS: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 2012 with 94.
  • Valley NWS: days with a maximum temperature at or above 90 F (32.2 C) in 32 years, most in 2012 with 62.
  • Valley NWS: days with a maximum temperature at or below 0 C (32 F) in 32 years, most in 2010 with 64.
  • Valley NWS: nights with a minimum temperature at or below 0 C (32 F) in 32 years, most in 2002 with 154.
  • 18 fixed thresholds have at least one qualifying day at Valley NWS.
32 years with a qualifying day
Days at or above 30 C (86 F) per year at Valley NWS Days per year at Valley NWS with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 94 in 2012. 02550751001995: 591996: 291997: 321998: 571999: 432000: 532001: 522002: 752003: 522004: 352005: 662006: 582007: 562008: 352009: 302010: 582011: 522012: 942013: 452014: 322015: 442016: 492017: 502018: 582019: 552020: 702021: 652022: 822023: 622024: 612025: 692026: 7019951999200320072011201520192023
Days per year at Valley NWS with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 94 in 2012.
Days at or above 30 C (86 F) per year at Valley NWS
YearDaysDecade average
19955944
19962944
19973244
19985744
19994344
20005351.2
20015251.2
20027551.2
20035251.2
20043551.2
20056651.2
20065851.2
20075651.2
20083551.2
20093051.2
20105853.7
20115253.7
20129453.7
20134553.7
20143253.7
20154453.7
20164953.7
20175053.7
20185853.7
20195553.7
20207068.4
20216568.4
20228268.4
20236268.4
20246168.4
20256968.4
20267068.4
First to last qualifying date each year at Valley NWS For each year, a bar from the first to the last day at Valley NWS meeting 30 C (86 F). 1995: 14 June 1995 to 12 October 19951996: 11 April 1996 to 4 September 19961997: 16 May 1997 to 7 October 19971998: 19 May 1998 to 30 September 19981999: 28 May 1999 to 24 September 19992000: 6 April 2000 to 2 October 20002001: 2 May 2001 to 6 September 20012002: 16 April 2002 to 2 October 20022003: 2 April 2003 to 20 October 20032004: 17 April 2004 to 21 September 20042005: 11 May 2005 to 5 October 20052006: 14 April 2006 to 4 October 20062007: 30 April 2007 to 7 October 20072008: 26 May 2008 to 2 September 20082009: 25 April 2009 to 25 August 20092010: 24 May 2010 to 9 October 20102011: 10 May 2011 to 5 October 20112012: 31 March 2012 to 25 September 20122013: 14 May 2013 to 27 September 20132014: 7 May 2014 to 19 September 20142015: 8 June 2015 to 11 October 20152016: 3 June 2016 to 23 September 20162017: 8 May 2017 to 24 September 20172018: 23 May 2018 to 3 October 20182019: 21 April 2019 to 30 September 20192020: 1 May 2020 to 11 October 20202021: 4 April 2021 to 28 September 20212022: 12 April 2022 to 23 October 20222023: 12 April 2023 to 2 October 20232024: 14 April 2024 to 10 October 20242025: 10 May 2025 to 12 October 20252026: 20 March 2026 to 12 October 202619951999200320072011201520192023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Valley NWS meeting 30 C (86 F).
First to last qualifying date each year at Valley NWS
YearFirst dateLast date
19951995-06-141995-10-12
19961996-04-111996-09-04
19971997-05-161997-10-07
19981998-05-191998-09-30
19991999-05-281999-09-24
20002000-04-062000-10-02
20012001-05-022001-09-06
20022002-04-162002-10-02
20032003-04-022003-10-20
20042004-04-172004-09-21
20052005-05-112005-10-05
20062006-04-142006-10-04
20072007-04-302007-10-07
20082008-05-262008-09-02
20092009-04-252009-08-25
20102010-05-242010-10-09
20112011-05-102011-10-05
20122012-03-312012-09-25
20132013-05-142013-09-27
20142014-05-072014-09-19
20152015-06-082015-10-11
20162016-06-032016-09-23
20172017-05-082017-09-24
20182018-05-232018-10-03
20192019-04-212019-09-30
20202020-05-012020-10-11
20212021-04-042021-09-28
20222022-04-122022-10-23
20232023-04-122023-10-02
20242024-04-142024-10-10
20252025-05-102025-10-12
20262026-03-202026-10-12

Every Fixed Threshold

Fixed thresholds at Valley NWS
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3294201270
35 C (95 F): Days313620129
40 C (104 F): Days2119951
90 F (32.2 C): Days3262201235
100 F (37.8 C): Days121420122
0 C (32 F): Ice days (max3264201019
0 C (32 F): Frost days (min32154200269
-10 C (14 F): Days with min3262199621
-20 C (-4 F): Days with min291419963
-30 C (-22 F): Days with min2119961
20 C (68 F): Tropical nights (min3250201656
25 C (77 F): Days with min17720114
10 mm (0.39 in): Days with 10 mm or more rain3233201526
25 mm (0.98 in): Days with 25 mm or more rain321420089
50 mm (1.97 in): Days with 50 mm or more rain25620142
100 mm (3.94 in): Days with 100 mm or more rain3120161
10 cm (3.9 in): Days with 10 cm or more snowfall29620071
25 cm (9.8 in): Days with 25 cm or more snowfall3120091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1995.

Download the Data

  • Data for Valley NWS 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).