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Data as of 2026-10-12
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Built 2026-10-18 (18 October 2026)

Opal Mountain California Threshold Days by Year

9 fixed thresholds counted per year at Opal Mountain California (USR0000COPA): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Opal Mountain California Thresholds

  • Opal Mountain California: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 2001 with 158.
  • Opal Mountain California: days with a maximum temperature at or above 35 C (95 F) in 33 years, most in 2024 with 94.
  • Opal Mountain California: days with a maximum temperature at or above 90 F (32.2 C) in 33 years, most in 2012 with 131.
  • Opal Mountain California: days with a maximum temperature at or above 100 F (37.8 C) in 33 years, most in 2024 with 50.
  • 9 fixed thresholds have at least one qualifying day at Opal Mountain California.
33 years with a qualifying day
Days at or above 30 C (86 F) per year at Opal Mountain California Days per year at Opal Mountain California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 158 in 2001. 0501001502001992: 1371993: 1151994: 1201997: 1361998: 951999: 1252000: 1322001: 1582002: 1392003: 1482004: 1332005: 1122006: 1382007: 1372008: 1332009: 1352010: 1192011: 1242012: 1542013: 1352014: 1372015: 1272016: 1182017: 1192018: 1352019: 1152020: 1482021: 1282022: 1362023: 1202024: 1482025: 1222026: 101199219982002200620102014201820222026
Days per year at Opal Mountain California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 158 in 2001.
Days at or above 30 C (86 F) per year at Opal Mountain California
YearDaysDecade average
1992137121.3
1993115121.3
1994120121.3
1997136121.3
199895121.3
1999125121.3
2000132136.5
2001158136.5
2002139136.5
2003148136.5
2004133136.5
2005112136.5
2006138136.5
2007137136.5
2008133136.5
2009135136.5
2010119128.3
2011124128.3
2012154128.3
2013135128.3
2014137128.3
2015127128.3
2016118128.3
2017119128.3
2018135128.3
2019115128.3
2020148129
2021128129
2022136129
2023120129
2024148129
2025122129
2026101129
First to last qualifying date each year at Opal Mountain California For each year, a bar from the first to the last day at Opal Mountain California meeting 30 C (86 F). 1992: 24 April 1992 to 13 October 19921993: 29 April 1993 to 4 October 19931994: 16 April 1994 to 2 October 19941997: 19 March 1997 to 17 October 19971998: 5 June 1998 to 12 October 19981999: 18 April 1999 to 22 October 19992000: 7 April 2000 to 6 October 20002001: 25 April 2001 to 20 October 20012002: 30 March 2002 to 15 October 20022003: 16 May 2003 to 28 October 20032004: 21 March 2004 to 15 October 20042005: 13 May 2005 to 14 October 20052006: 28 April 2006 to 30 September 20062007: 13 March 2007 to 28 October 20072008: 14 April 2008 to 29 October 20082009: 20 April 2009 to 3 November 20092010: 16 May 2010 to 16 October 20102011: 1 April 2011 to 23 October 20112012: 19 April 2012 to 19 October 20122013: 14 March 2013 to 26 October 20132014: 9 April 2014 to 24 October 20142015: 29 March 2015 to 14 October 20152016: 12 May 2016 to 9 October 20162017: 1 May 2017 to 27 October 20172018: 10 April 2018 to 30 September 20182019: 19 April 2019 to 8 October 20192020: 25 April 2020 to 21 October 20202021: 4 April 2021 to 3 October 20212022: 25 March 2022 to 14 October 20222023: 27 April 2023 to 21 October 20232024: 20 April 2024 to 26 October 20242025: 10 April 2025 to 8 October 20252026: 17 March 2026 to 14 August 20261992199920042009201420192024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Opal Mountain California meeting 30 C (86 F).
First to last qualifying date each year at Opal Mountain California
YearFirst dateLast date
19921992-04-241992-10-13
19931993-04-291993-10-04
19941994-04-161994-10-02
19971997-03-191997-10-17
19981998-06-051998-10-12
19991999-04-181999-10-22
20002000-04-072000-10-06
20012001-04-252001-10-20
20022002-03-302002-10-15
20032003-05-162003-10-28
20042004-03-212004-10-15
20052005-05-132005-10-14
20062006-04-282006-09-30
20072007-03-132007-10-28
20082008-04-142008-10-29
20092009-04-202009-11-03
20102010-05-162010-10-16
20112011-04-012011-10-23
20122012-04-192012-10-19
20132013-03-142013-10-26
20142014-04-092014-10-24
20152015-03-292015-10-14
20162016-05-122016-10-09
20172017-05-012017-10-27
20182018-04-102018-09-30
20192019-04-192019-10-08
20202020-04-252020-10-21
20212021-04-042021-10-03
20222022-03-252022-10-14
20232023-04-272023-10-21
20242024-04-202024-10-26
20252025-04-102025-10-08
20262026-03-172026-08-14

Every Fixed Threshold

Fixed thresholds at Opal Mountain California
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days331582001101
35 C (95 F): Days3394202458
40 C (104 F): Days3221202415
90 F (32.2 C): Days33131201281
100 F (37.8 C): Days3350202430
110 F (43.3 C): Days10520245
0 C (32 F): Frost days (min312320011
20 C (68 F): Tropical nights (min3297202058
25 C (77 F): Days with min323020248

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1992.

Download the Data

  • Data for Opal Mountain 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-12).