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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Hell Hole California Threshold Days by Year (USR0000CHEL)

7 fixed thresholds counted per year at Hell Hole California (USR0000CHEL): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hell Hole California Thresholds

  • Hell Hole California: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 2009 with 55.
  • Hell Hole California: days with a maximum temperature at or above 90 F (32.2 C) in 29 years, most in 2009 with 32.
  • Hell Hole California: days with a maximum temperature at or below 0 C (32 F) in 29 years, most in 2023 with 16.
  • Hell Hole California: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 1998 with 131.
  • 7 fixed thresholds have at least one qualifying day at Hell Hole California.
29 years with a qualifying day
Days at or above 30 C (86 F) per year at Hell Hole California Days per year at Hell Hole California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 55 in 2009. 02040601990: 191997: 131998: 321999: 142000: 222001: 382002: 322003: 482004: 342006: 392007: 462008: 442009: 552010: 272011: 302012: 412014: 352015: 192016: 222017: 372018: 352019: 92020: 282021: 552022: 352023: 222024: 452025: 222026: 321990199920022006200920122016201920222025
Days per year at Hell Hole California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 55 in 2009.
Days at or above 30 C (86 F) per year at Hell Hole California
YearDaysDecade average
19901919.5
19971319.5
19983219.5
19991419.5
20002239.8
20013839.8
20023239.8
20034839.8
20043439.8
20063939.8
20074639.8
20084439.8
20095539.8
20102728.3
20113028.3
20124128.3
20143528.3
20151928.3
20162228.3
20173728.3
20183528.3
2019928.3
20202834.1
20215534.1
20223534.1
20232234.1
20244534.1
20252234.1
20263234.1
First to last qualifying date each year at Hell Hole California For each year, a bar from the first to the last day at Hell Hole California meeting 30 C (86 F). 1990: 21 June 1990 to 10 September 19901997: 7 July 1997 to 14 August 19971998: 15 July 1998 to 4 September 19981999: 30 June 1999 to 26 September 19992000: 23 May 2000 to 20 September 20002001: 30 May 2001 to 2 October 20012002: 30 June 2002 to 23 September 20022003: 27 May 2003 to 28 September 20032004: 14 June 2004 to 11 September 20042006: 22 June 2006 to 13 September 20062007: 14 June 2007 to 11 September 20072008: 16 May 2008 to 28 September 20082009: 16 May 2009 to 27 September 20092010: 26 June 2010 to 1 October 20102011: 20 June 2011 to 29 September 20112012: 31 May 2012 to 17 October 20122014: 5 June 2014 to 12 September 20142015: 12 June 2015 to 12 September 20152016: 4 June 2016 to 20 August 20162017: 18 June 2017 to 5 September 20172018: 23 June 2018 to 3 September 20182019: 27 July 2019 to 28 August 20192020: 28 May 2020 to 3 October 20202021: 1 June 2021 to 9 September 20212022: 11 July 2022 to 9 September 20222023: 30 June 2023 to 30 August 20232024: 5 June 2024 to 1 October 20242025: 30 May 2025 to 1 September 20252026: 15 June 2026 to 8 October 202619902000200420092014201820222026JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hell Hole California meeting 30 C (86 F).
First to last qualifying date each year at Hell Hole California
YearFirst dateLast date
19901990-06-211990-09-10
19971997-07-071997-08-14
19981998-07-151998-09-04
19991999-06-301999-09-26
20002000-05-232000-09-20
20012001-05-302001-10-02
20022002-06-302002-09-23
20032003-05-272003-09-28
20042004-06-142004-09-11
20062006-06-222006-09-13
20072007-06-142007-09-11
20082008-05-162008-09-28
20092009-05-162009-09-27
20102010-06-262010-10-01
20112011-06-202011-09-29
20122012-05-312012-10-17
20142014-06-052014-09-12
20152015-06-122015-09-12
20162016-06-042016-08-20
20172017-06-182017-09-05
20182018-06-232018-09-03
20192019-07-272019-08-28
20202020-05-282020-10-03
20212021-06-012021-09-09
20222022-07-112022-09-09
20232023-06-302023-08-30
20242024-06-052024-10-01
20252025-05-302025-09-01
20262026-06-152026-10-08

Every Fixed Threshold

Fixed thresholds at Hell Hole California
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2955200932
35 C (95 F): Days211120062
90 F (32.2 C): Days2932200912
0 C (32 F): Ice days (max291620234
0 C (32 F): Frost days (min29131199823
-10 C (14 F): Days with min16719903
20 C (68 F): Tropical nights (min272120216

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1990.

Download the Data

  • Data for Hell Hole 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).