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Built 2026-10-18 (18 October 2026)

Rose Valley California Threshold Days by Year

8 fixed thresholds counted per year at Rose Valley California (USR0000CROS): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rose Valley California Thresholds

  • Rose Valley California: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 2003 with 119.
  • Rose Valley California: days with a maximum temperature at or above 35 C (95 F) in 33 years, most in 2024 with 40.
  • Rose Valley California: days with a maximum temperature at or above 90 F (32.2 C) in 33 years, most in 2003 with 88.
  • Rose Valley California: nights with a minimum temperature at or below 0 C (32 F) in 32 years, most in 1998 with 175.
  • 8 fixed thresholds have at least one qualifying day at Rose Valley California.
33 years with a qualifying day
Days at or above 30 C (86 F) per year at Rose Valley California Days per year at Rose Valley California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 119 in 2003. 0501001501994: 771995: 901996: 651997: 861998: 621999: 832000: 832001: 992002: 822003: 1192004: 912005: 772006: 862007: 892008: 1092009: 912010: 752011: 902012: 1152013: 1012014: 982015: 832016: 872017: 982018: 742019: 632020: 1072021: 912022: 1002023: 652024: 992025: 682026: 89199419982002200620102014201820222026
Days per year at Rose Valley California with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 119 in 2003.
Days at or above 30 C (86 F) per year at Rose Valley California
YearDaysDecade average
19947777.2
19959077.2
19966577.2
19978677.2
19986277.2
19998377.2
20008392.6
20019992.6
20028292.6
200311992.6
20049192.6
20057792.6
20068692.6
20078992.6
200810992.6
20099192.6
20107588.4
20119088.4
201211588.4
201310188.4
20149888.4
20158388.4
20168788.4
20179888.4
20187488.4
20196388.4
202010788.4
20219188.4
202210088.4
20236588.4
20249988.4
20256888.4
20268988.4
First to last qualifying date each year at Rose Valley California For each year, a bar from the first to the last day at Rose Valley California meeting 30 C (86 F). 1994: 1 June 1994 to 20 September 19941995: 11 June 1995 to 15 November 19951996: 25 April 1996 to 9 October 19961997: 5 May 1997 to 2 November 19971998: 28 June 1998 to 17 September 19981999: 13 June 1999 to 1 November 19992000: 20 May 2000 to 5 October 20002001: 1 May 2001 to 20 October 20012002: 13 April 2002 to 8 October 20022003: 19 January 2003 to 27 October 20032004: 21 March 2004 to 14 October 20042005: 20 May 2005 to 14 October 20052006: 10 May 2006 to 7 November 20062007: 16 March 2007 to 25 October 20072008: 27 April 2008 to 13 November 20082009: 20 April 2009 to 17 October 20092010: 4 June 2010 to 4 November 20102011: 31 March 2011 to 30 October 20112012: 20 April 2012 to 5 November 20122013: 27 April 2013 to 21 October 20132014: 14 February 2014 to 23 October 20142015: 29 May 2015 to 12 October 20152016: 30 May 2016 to 20 October 20162017: 3 May 2017 to 22 November 20172018: 9 May 2018 to 28 September 20182019: 4 June 2019 to 25 October 20192020: 24 April 2020 to 20 October 20202021: 30 May 2021 to 24 September 20212022: 14 May 2022 to 9 October 20222023: 28 April 2023 to 20 October 20232024: 1 June 2024 to 23 October 20242025: 9 May 2025 to 23 September 20252026: 17 March 2026 to 8 October 20261994199920042009201420192024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rose Valley California meeting 30 C (86 F).
First to last qualifying date each year at Rose Valley California
YearFirst dateLast date
19941994-06-011994-09-20
19951995-06-111995-11-15
19961996-04-251996-10-09
19971997-05-051997-11-02
19981998-06-281998-09-17
19991999-06-131999-11-01
20002000-05-202000-10-05
20012001-05-012001-10-20
20022002-04-132002-10-08
20032003-01-192003-10-27
20042004-03-212004-10-14
20052005-05-202005-10-14
20062006-05-102006-11-07
20072007-03-162007-10-25
20082008-04-272008-11-13
20092009-04-202009-10-17
20102010-06-042010-11-04
20112011-03-312011-10-30
20122012-04-202012-11-05
20132013-04-272013-10-21
20142014-02-142014-10-23
20152015-05-292015-10-12
20162016-05-302016-10-20
20172017-05-032017-11-22
20182018-05-092018-09-28
20192019-06-042019-10-25
20202020-04-242020-10-20
20212021-05-302021-09-24
20222022-05-142022-10-09
20232023-04-282023-10-20
20242024-06-012024-10-23
20252025-05-092025-09-23
20262026-03-172026-10-08

Every Fixed Threshold

Fixed thresholds at Rose Valley California
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days33119200389
35 C (95 F): Days3340202413
40 C (104 F): Days10320243
90 F (32.2 C): Days3388200357
100 F (37.8 C): Days2812202412
0 C (32 F): Frost days (min32175199866
-10 C (14 F): Days with min171120151
20 C (68 F): Tropical nights (min3620236

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1994.

Download the Data

  • Data for Rose Valley 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).