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Built 2026-10-19 (19 October 2026)

Potrero California Threshold Days by Year (USR0000CPOT)

11 fixed thresholds counted per year at Potrero California (USR0000CPOT): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Potrero California Thresholds

  • Potrero California: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 2008 with 147.
  • Potrero California: days with a maximum temperature at or above 35 C (95 F) in 31 years, most in 2003 with 79.
  • Potrero California: days with a maximum temperature at or above 90 F (32.2 C) in 31 years, most in 2008 with 120.
  • Potrero California: days with a maximum temperature at or above 100 F (37.8 C) in 31 years, most in 2006 with 33.
  • 11 fixed thresholds have at least one qualifying day at Potrero California.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Potrero California Days per year at Potrero California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 147 in 2008. 0501001501991: 761995: 1231996: 1331997: 1291998: 961999: 1172000: 1072003: 1372004: 1322005: 1022006: 1312007: 1342008: 1472009: 1112010: 832011: 982012: 1122013: 1072014: 1292015: 1082016: 1042017: 1212018: 1162019: 902020: 1312021: 1092022: 1052023: 822024: 1142025: 1072026: 12219911998200420082012201620202024
Days per year at Potrero California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 147 in 2008.
Days at or above 30 C (86 F) per year at Potrero California
YearDaysDecade average
199176112.3
1995123112.3
1996133112.3
1997129112.3
199896112.3
1999117112.3
2000107125.1
2003137125.1
2004132125.1
2005102125.1
2006131125.1
2007134125.1
2008147125.1
2009111125.1
201083106.8
201198106.8
2012112106.8
2013107106.8
2014129106.8
2015108106.8
2016104106.8
2017121106.8
2018116106.8
201990106.8
2020131110
2021109110
2022105110
202382110
2024114110
2025107110
2026122110
First to last qualifying date each year at Potrero California For each year, a bar from the first to the last day at Potrero California meeting 30 C (86 F). 1991: 7 May 1991 to 7 November 19911995: 29 May 1995 to 25 November 19951996: 8 February 1996 to 12 November 19961997: 11 March 1997 to 4 November 19971998: 20 April 1998 to 23 October 19981999: 17 April 1999 to 14 November 19992000: 24 April 2000 to 17 October 20002003: 4 January 2003 to 10 November 20032004: 9 March 2004 to 2 November 20042005: 9 March 2005 to 19 November 20052006: 13 April 2006 to 20 November 20062007: 12 March 2007 to 4 December 20072008: 13 April 2008 to 19 November 20082009: 1 March 2009 to 3 November 20092010: 4 June 2010 to 3 November 20102011: 31 March 2011 to 30 October 20112012: 20 April 2012 to 6 November 20122013: 14 March 2013 to 14 November 20132014: 14 February 2014 to 27 November 20142015: 26 March 2015 to 1 November 20152016: 19 April 2016 to 14 November 20162017: 13 March 2017 to 26 November 20172018: 30 March 2018 to 3 November 20182019: 8 April 2019 to 26 October 20192020: 24 April 2020 to 5 November 20202021: 29 April 2021 to 14 November 20212022: 24 March 2022 to 20 October 20222023: 21 April 2023 to 5 November 20232024: 21 April 2024 to 26 October 20242025: 24 March 2025 to 18 December 20252026: 27 February 2026 to 9 October 202619911998200420082012201620202024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Potrero California meeting 30 C (86 F).
First to last qualifying date each year at Potrero California
YearFirst dateLast date
19911991-05-071991-11-07
19951995-05-291995-11-25
19961996-02-081996-11-12
19971997-03-111997-11-04
19981998-04-201998-10-23
19991999-04-171999-11-14
20002000-04-242000-10-17
20032003-01-042003-11-10
20042004-03-092004-11-02
20052005-03-092005-11-19
20062006-04-132006-11-20
20072007-03-122007-12-04
20082008-04-132008-11-19
20092009-03-012009-11-03
20102010-06-042010-11-03
20112011-03-312011-10-30
20122012-04-202012-11-06
20132013-03-142013-11-14
20142014-02-142014-11-27
20152015-03-262015-11-01
20162016-04-192016-11-14
20172017-03-132017-11-26
20182018-03-302018-11-03
20192019-04-082019-10-26
20202020-04-242020-11-05
20212021-04-292021-11-14
20222022-03-242022-10-20
20232023-04-212023-11-05
20242024-04-212024-10-26
20252025-03-242025-12-18
20262026-02-272026-10-09

Every Fixed Threshold

Fixed thresholds at Potrero California
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days311472008122
35 C (95 F): Days3179200348
40 C (104 F): Days221319981
45 C (113 F): Days2120051
90 F (32.2 C): Days31120200887
100 F (37.8 C): Days3133200613
110 F (43.3 C): Days6220202
120 F (48.9 C): Days1120051
0 C (32 F): Frost days (min315919912
20 C (68 F): Tropical nights (min2611200610
25 C (77 F): Days with min1120171

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 Potrero 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).