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Built 2026-10-15 (15 October 2026)

Santa Rosa Island California Threshold Days by Year

8 fixed thresholds counted per year at Santa Rosa Island California (USR0000CSRI): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Santa Rosa Island California Thresholds

  • Santa Rosa Island California: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 2020 with 25.
  • Santa Rosa Island California: nights with a minimum temperature at or above 20 C (68 F) in 30 years, most in 2020 with 20.
  • Santa Rosa Island California: days with a maximum temperature at or above 90 F (32.2 C) in 27 years, most in 2020 with 17.
  • Santa Rosa Island California: days with a maximum temperature at or above 35 C (95 F) in 15 years, most in 2009 with 8.
  • 8 fixed thresholds have at least one qualifying day at Santa Rosa Island California.
30 years with a qualifying day
Days at or above 30 C (86 F) per year at Santa Rosa Island California Days per year at Santa Rosa Island California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 2020. 01020301991: 31992: 71996: 61997: 91998: 82000: 12001: 12002: 62003: 102004: 102005: 92006: 112008: 202009: 232010: 122011: 82012: 122013: 72014: 122015: 192016: 102017: 182018: 102019: 142020: 252021: 92022: 122023: 52025: 42026: 181991199720012004200820112014201720202023
Days per year at Santa Rosa Island California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 25 in 2020.
Days at or above 30 C (86 F) per year at Santa Rosa Island California
YearDaysDecade average
199136.6
199276.6
199666.6
199796.6
199886.6
2000110.1
2001110.1
2002610.1
20031010.1
20041010.1
2005910.1
20061110.1
20082010.1
20092310.1
20101212.2
2011812.2
20121212.2
2013712.2
20141212.2
20151912.2
20161012.2
20171812.2
20181012.2
20191412.2
20202512.2
2021912.2
20221212.2
2023512.2
2025412.2
20261812.2
First to last qualifying date each year at Santa Rosa Island California For each year, a bar from the first to the last day at Santa Rosa Island California meeting 30 C (86 F). 1991: 24 September 1991 to 2 October 19911992: 8 July 1992 to 8 October 19921996: 30 April 1996 to 7 October 19961997: 5 August 1997 to 3 November 19971998: 15 July 1998 to 3 September 19982000: 12 September 2000 to 12 September 20002001: 30 September 2001 to 30 September 20012002: 1 September 2002 to 7 October 20022003: 31 January 2003 to 28 October 20032004: 26 April 2004 to 22 September 20042005: 25 August 2005 to 1 November 20052006: 16 June 2006 to 19 November 20062008: 13 April 2008 to 17 November 20082009: 19 April 2009 to 2 November 20092010: 23 August 2010 to 12 December 20102011: 31 March 2011 to 22 October 20112012: 11 August 2012 to 5 November 20122013: 3 May 2013 to 6 October 20132014: 30 April 2014 to 6 October 20142015: 14 March 2015 to 24 October 20152016: 3 June 2016 to 9 November 20162017: 7 July 2017 to 22 November 20172018: 9 April 2018 to 20 October 20182019: 10 June 2019 to 17 November 20192020: 9 June 2020 to 5 November 20202021: 15 January 2021 to 14 November 20212022: 6 April 2022 to 19 October 20222023: 30 August 2023 to 7 October 20232025: 22 August 2025 to 29 October 20252026: 16 March 2026 to 7 October 202619911998200320082012201620202025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Santa Rosa Island California meeting 30 C (86 F).
First to last qualifying date each year at Santa Rosa Island California
YearFirst dateLast date
19911991-09-241991-10-02
19921992-07-081992-10-08
19961996-04-301996-10-07
19971997-08-051997-11-03
19981998-07-151998-09-03
20002000-09-122000-09-12
20012001-09-302001-09-30
20022002-09-012002-10-07
20032003-01-312003-10-28
20042004-04-262004-09-22
20052005-08-252005-11-01
20062006-06-162006-11-19
20082008-04-132008-11-17
20092009-04-192009-11-02
20102010-08-232010-12-12
20112011-03-312011-10-22
20122012-08-112012-11-05
20132013-05-032013-10-06
20142014-04-302014-10-06
20152015-03-142015-10-24
20162016-06-032016-11-09
20172017-07-072017-11-22
20182018-04-092018-10-20
20192019-06-102019-11-17
20202020-06-092020-11-05
20212021-01-152021-11-14
20222022-04-062022-10-19
20232023-08-302023-10-07
20252025-08-222025-10-29
20262026-03-162026-10-07

Every Fixed Threshold

Fixed thresholds at Santa Rosa Island California
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3025202018
35 C (95 F): Days15820094
40 C (104 F): Days1120201
90 F (32.2 C): Days271720209
100 F (37.8 C): Days6320171
0 C (32 F): Frost days (min2119981
20 C (68 F): Tropical nights (min3020202014
25 C (77 F): Days with min11520172

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 Santa Rosa Island 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 2026-10-13 (13 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-13).