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Built 2026-10-19 (19 October 2026)

Oak Knoll California Threshold Days by Year (USR0000COAK)

11 fixed thresholds counted per year at Oak Knoll California (USR0000COAK): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oak Knoll California Thresholds

  • Oak Knoll California: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 2021 with 120.
  • Oak Knoll California: days with a maximum temperature at or above 35 C (95 F) in 36 years, most in 2022 with 68.
  • Oak Knoll California: days with a maximum temperature at or above 90 F (32.2 C) in 36 years, most in 2021 with 98.
  • Oak Knoll California: days with a maximum temperature at or above 100 F (37.8 C) in 36 years, most in 2021 with 47.
  • 11 fixed thresholds have at least one qualifying day at Oak Knoll California.
36 years with a qualifying day
Days at or above 30 C (86 F) per year at Oak Knoll California Days per year at Oak Knoll California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 120 in 2021. 0501001501989: 981990: 841991: 1071992: 1161993: 781994: 1071995: 911996: 991997: 901998: 992000: 1092001: 1172002: 902003: 1182004: 1092005: 872006: 1072007: 972008: 1072009: 1032010: 872011: 902012: 1162013: 932014: 1182015: 1172016: 1002017: 1042018: 1072019: 962020: 1162021: 1202022: 1102023: 1172025: 1152026: 120198919931997200220062010201420182022
Days per year at Oak Knoll California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 120 in 2021.
Days at or above 30 C (86 F) per year at Oak Knoll California
YearDaysDecade average
19899898
19908496.8
199110796.8
199211696.8
19937896.8
199410796.8
19959196.8
19969996.8
19979096.8
19989996.8
2000109104.4
2001117104.4
200290104.4
2003118104.4
2004109104.4
200587104.4
2006107104.4
200797104.4
2008107104.4
2009103104.4
201087102.8
201190102.8
2012116102.8
201393102.8
2014118102.8
2015117102.8
2016100102.8
2017104102.8
2018107102.8
201996102.8
2020116116.3
2021120116.3
2022110116.3
2023117116.3
2025115116.3
2026120116.3
First to last qualifying date each year at Oak Knoll California For each year, a bar from the first to the last day at Oak Knoll California meeting 30 C (86 F). 1989: 6 April 1989 to 9 October 19891990: 13 April 1990 to 4 October 19901991: 1 June 1991 to 15 October 19911992: 2 April 1992 to 12 October 19921993: 20 March 1993 to 3 October 19931994: 15 April 1994 to 8 October 19941995: 19 May 1995 to 2 October 19951996: 6 April 1996 to 9 October 19961997: 8 May 1997 to 30 September 19971998: 28 April 1998 to 30 September 19982000: 2 April 2000 to 8 October 20002001: 25 April 2001 to 6 October 20012002: 24 May 2002 to 17 October 20022003: 21 May 2003 to 28 October 20032004: 25 April 2004 to 15 October 20042005: 25 May 2005 to 30 September 20052006: 28 April 2006 to 13 October 20062007: 27 April 2007 to 27 September 20072008: 15 May 2008 to 26 October 20082009: 19 April 2009 to 28 September 20092010: 12 June 2010 to 14 October 20102011: 9 June 2011 to 30 September 20112012: 21 April 2012 to 11 October 20122013: 26 April 2013 to 19 September 20132014: 30 April 2014 to 7 October 20142015: 20 April 2015 to 16 October 20152016: 6 April 2016 to 29 September 20162017: 3 May 2017 to 28 September 20172018: 25 April 2018 to 20 October 20182019: 18 April 2019 to 26 September 20192020: 28 April 2020 to 17 October 20202021: 18 April 2021 to 4 October 20212022: 7 April 2022 to 20 October 20222023: 26 April 2023 to 20 October 20232025: 1 May 2025 to 28 September 20252026: 17 March 2026 to 9 October 202619891994200020052010201520202026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Oak Knoll California meeting 30 C (86 F).
First to last qualifying date each year at Oak Knoll California
YearFirst dateLast date
19891989-04-061989-10-09
19901990-04-131990-10-04
19911991-06-011991-10-15
19921992-04-021992-10-12
19931993-03-201993-10-03
19941994-04-151994-10-08
19951995-05-191995-10-02
19961996-04-061996-10-09
19971997-05-081997-09-30
19981998-04-281998-09-30
20002000-04-022000-10-08
20012001-04-252001-10-06
20022002-05-242002-10-17
20032003-05-212003-10-28
20042004-04-252004-10-15
20052005-05-252005-09-30
20062006-04-282006-10-13
20072007-04-272007-09-27
20082008-05-152008-10-26
20092009-04-192009-09-28
20102010-06-122010-10-14
20112011-06-092011-09-30
20122012-04-212012-10-11
20132013-04-262013-09-19
20142014-04-302014-10-07
20152015-04-202015-10-16
20162016-04-062016-09-29
20172017-05-032017-09-28
20182018-04-252018-10-20
20192019-04-182019-09-26
20202020-04-282020-10-17
20212021-04-182021-10-04
20222022-04-072022-10-20
20232023-04-262023-10-20
20252025-05-012025-09-28
20262026-03-172026-10-09

Every Fixed Threshold

Fixed thresholds at Oak Knoll California
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days361202021120
35 C (95 F): Days3668202268
40 C (104 F): Days342020217
45 C (113 F): Days2220222
90 F (32.2 C): Days3698202199
100 F (37.8 C): Days3647202126
110 F (43.3 C): Days11619981
0 C (32 F): Ice days (max6419901
0 C (32 F): Frost days (min36150201340
-10 C (14 F): Days with min12919903
20 C (68 F): Tropical nights (min6520221

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1989.

Download the Data

  • Data for Oak Knoll 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-17).