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Built 2026-10-17 (17 October 2026)

Boonville California Threshold Days by Year

10 fixed thresholds counted per year at Boonville California (USR0000CBOO): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Boonville California Thresholds

  • Boonville California: days with a maximum temperature at or above 30 C (86 F) in 34 years, most in 2001 with 89.
  • Boonville California: days with a maximum temperature at or above 35 C (95 F) in 34 years, most in 1996 with 38.
  • Boonville California: days with a maximum temperature at or above 90 F (32.2 C) in 34 years, most in 2001 with 66.
  • Boonville California: days with a maximum temperature at or above 100 F (37.8 C) in 34 years, most in 2024 with 18.
  • 10 fixed thresholds have at least one qualifying day at Boonville California.
34 years with a qualifying day
Days at or above 30 C (86 F) per year at Boonville California Days per year at Boonville California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 89 in 2001. 02550751001991: 381992: 741994: 671995: 691996: 841997: 711998: 661999: 722000: 752001: 892003: 612004: 582005: 642006: 572007: 392008: 542009: 632010: 432011: 462012: 562013: 492014: 772015: 652016: 672017: 792018: 632019: 582020: 882021: 872022: 712023: 632024: 872025: 582026: 73199119962000200520092013201720212025
Days per year at Boonville California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 89 in 2001.
Days at or above 30 C (86 F) per year at Boonville California
YearDaysDecade average
19913867.6
19927467.6
19946767.6
19956967.6
19968467.6
19977167.6
19986667.6
19997267.6
20007562.2
20018962.2
20036162.2
20045862.2
20056462.2
20065762.2
20073962.2
20085462.2
20096362.2
20104360.3
20114660.3
20125660.3
20134960.3
20147760.3
20156560.3
20166760.3
20177960.3
20186360.3
20195860.3
20208875.3
20218775.3
20227175.3
20236375.3
20248775.3
20255875.3
20267375.3
First to last qualifying date each year at Boonville California For each year, a bar from the first to the last day at Boonville California meeting 30 C (86 F). 1991: 1 June 1991 to 19 October 19911992: 22 May 1992 to 23 October 19921994: 15 April 1994 to 8 October 19941995: 30 May 1995 to 13 November 19951996: 29 April 1996 to 9 October 19961997: 10 May 1997 to 4 November 19971998: 27 April 1998 to 26 October 19981999: 14 April 1999 to 1 November 19992000: 31 March 2000 to 6 October 20002001: 3 May 2001 to 26 October 20012003: 27 May 2003 to 28 October 20032004: 9 April 2004 to 15 October 20042005: 11 March 2005 to 17 October 20052006: 10 May 2006 to 22 October 20062007: 28 April 2007 to 23 October 20072008: 14 May 2008 to 26 October 20082009: 19 April 2009 to 27 September 20092010: 12 June 2010 to 15 October 20102011: 4 May 2011 to 17 October 20112012: 21 April 2012 to 18 October 20122013: 22 April 2013 to 6 October 20132014: 29 April 2014 to 13 October 20142015: 27 April 2015 to 14 October 20152016: 6 April 2016 to 9 October 20162017: 3 May 2017 to 27 October 20172018: 23 April 2018 to 16 October 20182019: 18 April 2019 to 25 October 20192020: 7 May 2020 to 2 November 20202021: 5 May 2021 to 16 October 20212022: 22 March 2022 to 20 October 20222023: 26 April 2023 to 19 October 20232024: 10 May 2024 to 19 October 20242025: 25 March 2025 to 7 October 20252026: 16 March 2026 to 9 October 20261991199720032008201320182023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Boonville California meeting 30 C (86 F).
First to last qualifying date each year at Boonville California
YearFirst dateLast date
19911991-06-011991-10-19
19921992-05-221992-10-23
19941994-04-151994-10-08
19951995-05-301995-11-13
19961996-04-291996-10-09
19971997-05-101997-11-04
19981998-04-271998-10-26
19991999-04-141999-11-01
20002000-03-312000-10-06
20012001-05-032001-10-26
20032003-05-272003-10-28
20042004-04-092004-10-15
20052005-03-112005-10-17
20062006-05-102006-10-22
20072007-04-282007-10-23
20082008-05-142008-10-26
20092009-04-192009-09-27
20102010-06-122010-10-15
20112011-05-042011-10-17
20122012-04-212012-10-18
20132013-04-222013-10-06
20142014-04-292014-10-13
20152015-04-272015-10-14
20162016-04-062016-10-09
20172017-05-032017-10-27
20182018-04-232018-10-16
20192019-04-182019-10-25
20202020-05-072020-11-02
20212021-05-052021-10-16
20222022-03-222022-10-20
20232023-04-262023-10-19
20242024-05-102024-10-19
20252025-03-252025-10-07
20262026-03-162026-10-09

Every Fixed Threshold

Fixed thresholds at Boonville California
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3489200173
35 C (95 F): Days3438199619
40 C (104 F): Days26919989
45 C (113 F): Days1120221
90 F (32.2 C): Days3466200144
100 F (37.8 C): Days341820245
110 F (43.3 C): Days6319981
0 C (32 F): Frost days (min342920132
20 C (68 F): Tropical nights (min6720012
25 C (77 F): Days with min1120011

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1991.

Download the Data

  • Data for Boonville California 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-15).