Foster Dam Threshold Days by Year (USC00353047)
15 fixed thresholds counted per year at Foster Dam (USC00353047): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Foster Dam Thresholds
- Foster Dam: days with a maximum temperature at or above 30 C (86 F) in 56 years, most in 2013 with 50.
- Foster Dam: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 1996 with 75.
- Foster Dam: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1996 with 25.
- Foster Dam: days with a maximum temperature at or above 90 F (32.2 C) in 55 years, most in 2003 with 29.
- 15 fixed thresholds have at least one qualifying day at Foster Dam.
Days at or above 30 C (86 F)
56 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1970 | 29 | 21.3 |
| 1971 | 18 | 21.3 |
| 1972 | 33 | 21.3 |
| 1973 | 22 | 21.3 |
| 1974 | 27 | 21.3 |
| 1975 | 15 | 21.3 |
| 1976 | 13 | 21.3 |
| 1977 | 19 | 21.3 |
| 1978 | 22 | 21.3 |
| 1979 | 15 | 21.3 |
| 1980 | 14 | 23.3 |
| 1981 | 23 | 23.3 |
| 1982 | 15 | 23.3 |
| 1983 | 10 | 23.3 |
| 1984 | 15 | 23.3 |
| 1985 | 28 | 23.3 |
| 1986 | 36 | 23.3 |
| 1987 | 40 | 23.3 |
| 1988 | 33 | 23.3 |
| 1989 | 19 | 23.3 |
| 1990 | 29 | 27.8 |
| 1991 | 35 | 27.8 |
| 1992 | 43 | 27.8 |
| 1993 | 19 | 27.8 |
| 1994 | 21 | 27.8 |
| 1995 | 21 | 27.8 |
| 1996 | 27 | 27.8 |
| 1997 | 22 | 27.8 |
| 1998 | 30 | 27.8 |
| 1999 | 31 | 27.8 |
| 2000 | 24 | 33.1 |
| 2001 | 22 | 33.1 |
| 2002 | 34 | 33.1 |
| 2003 | 44 | 33.1 |
| 2004 | 37 | 33.1 |
| 2005 | 33 | 33.1 |
| 2006 | 42 | 33.1 |
| 2007 | 30 | 33.1 |
| 2008 | 26 | 33.1 |
| 2009 | 39 | 33.1 |
| 2010 | 23 | 36.3 |
| 2011 | 24 | 36.3 |
| 2012 | 22 | 36.3 |
| 2013 | 50 | 36.3 |
| 2014 | 48 | 36.3 |
| 2015 | 45 | 36.3 |
| 2016 | 38 | 36.3 |
| 2017 | 45 | 36.3 |
| 2018 | 45 | 36.3 |
| 2019 | 23 | 36.3 |
| 2020 | 35 | 37 |
| 2021 | 48 | 37 |
| 2022 | 38 | 37 |
| 2023 | 42 | 37 |
| 2024 | 34 | 37 |
| 2026 | 25 | 37 |
| Year | First date | Last date |
|---|---|---|
| 1970 | 1970-06-01 | 1970-08-31 |
| 1971 | 1971-06-23 | 1971-08-20 |
| 1972 | 1972-05-28 | 1972-09-04 |
| 1973 | 1973-05-14 | 1973-09-11 |
| 1974 | 1974-06-30 | 1974-09-26 |
| 1975 | 1975-05-14 | 1975-10-02 |
| 1976 | 1976-06-19 | 1976-10-08 |
| 1977 | 1977-07-01 | 1977-08-18 |
| 1978 | 1978-06-02 | 1978-08-11 |
| 1979 | 1979-06-02 | 1979-09-15 |
| 1980 | 1980-07-21 | 1980-10-06 |
| 1981 | 1981-07-03 | 1981-09-17 |
| 1982 | 1982-06-11 | 1982-09-03 |
| 1983 | 1983-05-24 | 1983-08-15 |
| 1984 | 1984-06-26 | 1984-09-18 |
| 1985 | 1985-06-18 | 1985-08-27 |
| 1986 | 1986-05-26 | 1986-09-07 |
| 1987 | 1987-05-08 | 1987-10-07 |
| 1988 | 1988-05-12 | 1988-10-02 |
| 1989 | 1989-06-05 | 1989-09-24 |
| 1990 | 1990-06-22 | 1990-09-23 |
| 1991 | 1991-07-03 | 1991-10-12 |
| 1992 | 1992-05-04 | 1992-09-29 |
| 1993 | 1993-06-26 | 1993-10-02 |
| 1994 | 1994-07-08 | 1994-09-23 |
| 1995 | 1995-05-30 | 1995-09-23 |
| 1996 | 1996-06-03 | 1996-09-11 |
| 1997 | 1997-05-12 | 1997-09-25 |
| 1998 | 1998-07-16 | 1998-09-16 |
| 1999 | 1999-05-24 | 1999-09-23 |
| 2000 | 2000-06-26 | 2000-09-14 |
| 2001 | 2001-05-23 | 2001-10-02 |
| 2002 | 2002-06-13 | 2002-09-14 |
| 2003 | 2003-06-05 | 2003-09-28 |
| 2004 | 2004-06-17 | 2004-09-01 |
| 2005 | 2005-05-26 | 2005-09-30 |
| 2006 | 2006-05-16 | 2006-09-28 |
| 2007 | 2007-05-30 | 2007-09-12 |
| 2008 | 2008-05-17 | 2008-09-18 |
| 2009 | 2009-06-02 | 2009-09-23 |
| 2010 | 2010-07-08 | 2010-09-28 |
| 2011 | 2011-07-07 | 2011-09-30 |
| 2012 | 2012-05-14 | 2012-09-29 |
| 2013 | 2013-05-12 | 2013-09-12 |
| 2014 | 2014-05-01 | 2014-09-22 |
| 2015 | 2015-06-07 | 2015-09-13 |
| 2016 | 2016-04-08 | 2016-09-27 |
| 2017 | 2017-05-22 | 2017-09-29 |
| 2018 | 2018-04-25 | 2018-09-29 |
| 2019 | 2019-05-10 | 2019-09-01 |
| 2020 | 2020-05-29 | 2020-09-30 |
| 2021 | 2021-06-01 | 2021-09-09 |
| 2022 | 2022-06-26 | 2022-09-27 |
| 2023 | 2023-04-29 | 2023-09-17 |
| 2024 | 2024-05-11 | 2024-09-25 |
| 2026 | 2026-06-03 | 2026-09-10 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 56 | 50 | 2013 | 25 |
| 35 C (95 F): Days | 50 | 13 | 2015 | 2 |
| 40 C (104 F): Days | 6 | 2 | 1981 | 2 |
| 90 F (32.2 C): Days | 55 | 29 | 2003 | 13 |
| 100 F (37.8 C): Days | 25 | 5 | 2017 | 4 |
| 110 F (43.3 C): Days | 1 | 1 | 2021 | 1 |
| 0 C (32 F): Ice days (max | 28 | 7 | 1979 | 3 |
| 0 C (32 F): Frost days (min | 54 | 102 | 1985 | 31 |
| -10 C (14 F): Days with min | 14 | 9 | 1974 | 2 |
| 20 C (68 F): Tropical nights (min | 4 | 1 | 1998 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 56 | 75 | 1996 | 23 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 56 | 25 | 1996 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 31 | 3 | 1974 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 2 | 1 | 1996 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 2 | 1 | 1971 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1970.
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).