Stevenson Dam Threshold Days by Year (USC00368469)
18 fixed thresholds counted per year at Stevenson Dam (USC00368469): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Stevenson Dam Thresholds
- Stevenson Dam: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 2018 with 52.
- Stevenson Dam: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1996 with 15.
- Stevenson Dam: days with a maximum temperature at or above 30 C (86 F) in 55 years, most in 2002 with 51.
- Stevenson Dam: days with a maximum temperature at or below 0 C (32 F) in 55 years, most in 1995 with 65.
- 18 fixed thresholds have at least one qualifying day at Stevenson Dam.
Days at or above 30 C (86 F)
55 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1970 | 32 | 24.3 |
| 1971 | 30 | 24.3 |
| 1972 | 18 | 24.3 |
| 1973 | 31 | 24.3 |
| 1974 | 16 | 24.3 |
| 1975 | 25 | 24.3 |
| 1976 | 20 | 24.3 |
| 1977 | 29 | 24.3 |
| 1978 | 24 | 24.3 |
| 1979 | 18 | 24.3 |
| 1980 | 33 | 26.8 |
| 1981 | 12 | 26.8 |
| 1982 | 21 | 26.8 |
| 1983 | 49 | 26.8 |
| 1984 | 24 | 26.8 |
| 1985 | 19 | 26.8 |
| 1986 | 14 | 26.8 |
| 1988 | 49 | 26.8 |
| 1989 | 20 | 26.8 |
| 1990 | 24 | 23.9 |
| 1991 | 43 | 23.9 |
| 1992 | 10 | 23.9 |
| 1993 | 33 | 23.9 |
| 1994 | 18 | 23.9 |
| 1995 | 23 | 23.9 |
| 1996 | 19 | 23.9 |
| 1997 | 16 | 23.9 |
| 1999 | 29 | 23.9 |
| 2000 | 14 | 28.2 |
| 2001 | 32 | 28.2 |
| 2002 | 51 | 28.2 |
| 2003 | 15 | 28.2 |
| 2004 | 9 | 28.2 |
| 2005 | 51 | 28.2 |
| 2006 | 30 | 28.2 |
| 2007 | 42 | 28.2 |
| 2008 | 25 | 28.2 |
| 2009 | 13 | 28.2 |
| 2010 | 37 | 28.1 |
| 2011 | 41 | 28.1 |
| 2012 | 42 | 28.1 |
| 2013 | 27 | 28.1 |
| 2014 | 12 | 28.1 |
| 2015 | 20 | 28.1 |
| 2016 | 43 | 28.1 |
| 2017 | 17 | 28.1 |
| 2018 | 27 | 28.1 |
| 2019 | 15 | 28.1 |
| 2020 | 35 | 33 |
| 2021 | 38 | 33 |
| 2022 | 41 | 33 |
| 2023 | 18 | 33 |
| 2024 | 34 | 33 |
| 2025 | 43 | 33 |
| 2026 | 22 | 33 |
| Year | First date | Last date |
|---|---|---|
| 1970 | 1970-05-02 | 1970-09-26 |
| 1971 | 1971-05-19 | 1971-09-11 |
| 1972 | 1972-05-25 | 1972-09-18 |
| 1973 | 1973-06-06 | 1973-09-06 |
| 1974 | 1974-05-15 | 1974-08-28 |
| 1975 | 1975-05-20 | 1975-08-27 |
| 1976 | 1976-04-18 | 1976-09-15 |
| 1977 | 1977-05-18 | 1977-09-03 |
| 1978 | 1978-05-27 | 1978-09-22 |
| 1979 | 1979-05-09 | 1979-08-09 |
| 1980 | 1980-05-24 | 1980-09-03 |
| 1981 | 1981-06-16 | 1981-07-20 |
| 1982 | 1982-05-07 | 1982-08-17 |
| 1983 | 1983-06-12 | 1983-09-21 |
| 1984 | 1984-05-23 | 1984-08-17 |
| 1985 | 1985-04-21 | 1985-09-08 |
| 1986 | 1986-05-18 | 1986-10-01 |
| 1988 | 1988-05-29 | 1988-08-19 |
| 1989 | 1989-05-19 | 1989-09-11 |
| 1990 | 1990-04-26 | 1990-09-03 |
| 1991 | 1991-05-15 | 1991-09-17 |
| 1992 | 1992-05-22 | 1992-08-27 |
| 1993 | 1993-05-10 | 1993-09-14 |
| 1994 | 1994-04-27 | 1994-07-21 |
| 1995 | 1995-07-15 | 1995-09-08 |
| 1996 | 1996-05-19 | 1996-09-04 |
| 1997 | 1997-06-21 | 1997-08-11 |
| 1999 | 1999-05-30 | 1999-09-06 |
| 2000 | 2000-05-07 | 2000-09-04 |
| 2001 | 2001-04-24 | 2001-09-09 |
| 2002 | 2002-04-17 | 2002-09-12 |
| 2003 | 2003-06-24 | 2003-08-30 |
| 2004 | 2004-05-13 | 2004-08-29 |
| 2005 | 2005-05-11 | 2005-09-15 |
| 2006 | 2006-05-29 | 2006-09-26 |
| 2007 | 2007-05-10 | 2007-10-09 |
| 2008 | 2008-05-27 | 2008-09-06 |
| 2009 | 2009-04-26 | 2009-08-22 |
| 2010 | 2010-05-02 | 2010-09-25 |
| 2011 | 2011-05-27 | 2011-09-05 |
| 2012 | 2012-04-17 | 2012-09-07 |
| 2013 | 2013-05-22 | 2013-09-12 |
| 2014 | 2014-05-09 | 2014-09-06 |
| 2015 | 2015-05-09 | 2015-09-10 |
| 2016 | 2016-05-28 | 2016-09-11 |
| 2017 | 2017-05-18 | 2017-09-28 |
| 2018 | 2018-05-29 | 2018-09-08 |
| 2019 | 2019-06-28 | 2019-09-12 |
| 2020 | 2020-05-26 | 2020-09-11 |
| 2021 | 2021-05-20 | 2021-08-29 |
| 2022 | 2022-04-25 | 2022-08-30 |
| 2023 | 2023-04-14 | 2023-09-08 |
| 2024 | 2024-04-30 | 2024-08-29 |
| 2025 | 2025-04-30 | 2025-09-20 |
| 2026 | 2026-04-17 | 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 | 55 | 51 | 2002 | 22 |
| 35 C (95 F): Days | 17 | 13 | 1988 | 2 |
| 40 C (104 F): Days | 1 | 1 | 2011 | 1 |
| 90 F (32.2 C): Days | 52 | 36 | 1988 | 9 |
| 100 F (37.8 C): Days | 2 | 2 | 2011 | 2 |
| 0 C (32 F): Ice days (max | 55 | 65 | 1995 | 32 |
| 0 C (32 F): Frost days (min | 52 | 184 | 1994 | 93 |
| -10 C (14 F): Days with min | 52 | 58 | 1980 | 25 |
| -20 C (-4 F): Days with min | 36 | 16 | 2014 | 8 |
| -30 C (-22 F): Days with min | 1 | 1 | 1994 | 1 |
| 20 C (68 F): Tropical nights (min | 35 | 9 | 2016 | 5 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 56 | 52 | 2018 | 33 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 56 | 15 | 1996 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 38 | 3 | 1972 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 2 | 2004 | 2 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 45 | 8 | 1994 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 8 | 2 | 1978 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 2020 | 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).