California Threshold Days by Year (USC00231189)
17 fixed thresholds counted per year at California (USC00231189): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for California Thresholds
- California: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 2010 with 44.
- California: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 2005 with 21.
- California: days with 50 mm (1.97 in) or more of precipitation in 59 years, most in 1993 with 7.
- California: days with a maximum temperature at or above 30 C (86 F) in 53 years, most in 1980 with 119.
- 17 fixed thresholds have at least one qualifying day at California.
Days at or above 30 C (86 F)
53 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1955 | 92 | 88.7 |
| 1956 | 116 | 88.7 |
| 1957 | 58 | 88.7 |
| 1972 | 107 | 82.9 |
| 1973 | 79 | 82.9 |
| 1974 | 64 | 82.9 |
| 1975 | 83 | 82.9 |
| 1976 | 81 | 82.9 |
| 1977 | 87 | 82.9 |
| 1978 | 85 | 82.9 |
| 1979 | 77 | 82.9 |
| 1980 | 119 | 85 |
| 1981 | 70 | 85 |
| 1982 | 49 | 85 |
| 1983 | 92 | 85 |
| 1984 | 85 | 85 |
| 1985 | 68 | 85 |
| 1986 | 89 | 85 |
| 1987 | 106 | 85 |
| 1988 | 99 | 85 |
| 1989 | 73 | 85 |
| 1990 | 70 | 63.1 |
| 1991 | 99 | 63.1 |
| 1992 | 55 | 63.1 |
| 1993 | 63 | 63.1 |
| 1994 | 56 | 63.1 |
| 1995 | 57 | 63.1 |
| 1996 | 44 | 63.1 |
| 1997 | 51 | 63.1 |
| 1998 | 69 | 63.1 |
| 1999 | 67 | 63.1 |
| 2000 | 63 | 51.5 |
| 2001 | 60 | 51.5 |
| 2002 | 69 | 51.5 |
| 2003 | 54 | 51.5 |
| 2004 | 20 | 51.5 |
| 2005 | 65 | 51.5 |
| 2006 | 65 | 51.5 |
| 2007 | 61 | 51.5 |
| 2008 | 33 | 51.5 |
| 2009 | 25 | 51.5 |
| 2010 | 70 | 61.9 |
| 2011 | 70 | 61.9 |
| 2013 | 49 | 61.9 |
| 2014 | 46 | 61.9 |
| 2015 | 48 | 61.9 |
| 2016 | 63 | 61.9 |
| 2017 | 57 | 61.9 |
| 2018 | 87 | 61.9 |
| 2019 | 67 | 61.9 |
| 2020 | 64 | 65 |
| 2021 | 61 | 65 |
| 2026 | 70 | 65 |
| Year | First date | Last date |
|---|---|---|
| 1955 | 1955-04-15 | 1955-10-06 |
| 1956 | 1956-04-27 | 1956-10-20 |
| 1957 | 1957-05-12 | 1957-10-01 |
| 1972 | 1972-04-06 | 1972-09-21 |
| 1973 | 1973-05-22 | 1973-10-03 |
| 1974 | 1974-05-13 | 1974-08-27 |
| 1975 | 1975-05-18 | 1975-10-13 |
| 1976 | 1976-06-12 | 1976-10-04 |
| 1977 | 1977-04-16 | 1977-10-28 |
| 1978 | 1978-05-24 | 1978-10-22 |
| 1979 | 1979-05-07 | 1979-10-21 |
| 1980 | 1980-04-21 | 1980-10-10 |
| 1981 | 1981-04-13 | 1981-10-05 |
| 1982 | 1982-06-27 | 1982-10-05 |
| 1983 | 1983-06-12 | 1983-10-04 |
| 1984 | 1984-06-01 | 1984-09-25 |
| 1985 | 1985-04-18 | 1985-09-20 |
| 1986 | 1986-04-25 | 1986-09-29 |
| 1987 | 1987-04-19 | 1987-09-26 |
| 1988 | 1988-05-12 | 1988-10-18 |
| 1989 | 1989-04-22 | 1989-10-15 |
| 1990 | 1990-04-23 | 1990-09-28 |
| 1991 | 1991-05-14 | 1991-09-15 |
| 1992 | 1992-06-13 | 1992-09-16 |
| 1993 | 1993-06-13 | 1993-09-23 |
| 1994 | 1994-04-15 | 1994-10-01 |
| 1995 | 1995-05-13 | 1995-09-07 |
| 1996 | 1996-04-20 | 1996-09-08 |
| 1997 | 1997-05-18 | 1997-10-04 |
| 1998 | 1998-05-14 | 1998-09-30 |
| 1999 | 1999-06-05 | 1999-10-16 |
| 2000 | 2000-05-09 | 2000-10-04 |
| 2001 | 2001-04-10 | 2001-09-08 |
| 2002 | 2002-04-16 | 2002-10-02 |
| 2003 | 2003-05-10 | 2003-09-12 |
| 2004 | 2004-05-21 | 2004-08-28 |
| 2005 | 2005-06-05 | 2005-09-23 |
| 2006 | 2006-04-14 | 2006-10-04 |
| 2007 | 2007-06-07 | 2007-10-08 |
| 2008 | 2008-05-26 | 2008-09-05 |
| 2009 | 2009-05-31 | 2009-08-26 |
| 2010 | 2010-05-24 | 2010-09-22 |
| 2011 | 2011-04-04 | 2011-09-14 |
| 2013 | 2013-05-15 | 2013-10-05 |
| 2014 | 2014-05-05 | 2014-09-10 |
| 2015 | 2015-06-08 | 2015-09-18 |
| 2016 | 2016-05-27 | 2016-10-18 |
| 2017 | 2017-04-20 | 2017-10-15 |
| 2018 | 2018-04-13 | 2018-10-06 |
| 2019 | 2019-05-17 | 2019-10-03 |
| 2020 | 2020-04-09 | 2020-10-15 |
| 2021 | 2021-06-05 | 2021-09-29 |
| 2026 | 2026-03-21 | 2026-10-14 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 53 | 119 | 1980 | 70 |
| 35 C (95 F): Days | 49 | 60 | 1980 | 14 |
| 40 C (104 F): Days | 8 | 19 | 1980 | 1 |
| 90 F (32.2 C): Days | 53 | 88 | 1980 | 44 |
| 100 F (37.8 C): Days | 24 | 34 | 1980 | 1 |
| 0 C (32 F): Ice days (max | 53 | 44 | 2010 | 9 |
| 0 C (32 F): Frost days (min | 53 | 130 | 2013 | 42 |
| -10 C (14 F): Days with min | 53 | 39 | 1979 | 13 |
| -20 C (-4 F): Days with min | 31 | 8 | 1977 | 1 |
| 20 C (68 F): Tropical nights (min | 53 | 72 | 1980 | 59 |
| 25 C (77 F): Days with min | 34 | 16 | 1980 | 7 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 67 | 44 | 2010 | 28 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 67 | 21 | 2005 | 16 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 59 | 7 | 1993 | 5 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 10 | 1 | 1956 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 28 | 5 | 2003 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 1 | 1 | 2006 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.
Download the Data
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).