Confluence 1 SW Dam Threshold Days by Year (USC00361705)
18 fixed thresholds counted per year at Confluence 1 SW Dam (USC00361705): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Confluence 1 SW Dam Thresholds
- Confluence 1 SW Dam: days with a maximum temperature at or above 30 C (86 F) in 80 years, most in 1991 with 81.
- Confluence 1 SW Dam: days with a maximum temperature at or below 0 C (32 F) in 80 years, most in 2010 with 60.
- Confluence 1 SW Dam: nights with a minimum temperature at or below 0 C (32 F) in 80 years, most in 1994 with 192.
- Confluence 1 SW Dam: nights with a minimum temperature at or below -10 C (14 F) in 80 years, most in 1995 with 61.
- 18 fixed thresholds have at least one qualifying day at Confluence 1 SW Dam.
Days at or above 30 C (86 F)
80 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1947 | 39 | 32 |
| 1948 | 25 | 32 |
| 1949 | 32 | 32 |
| 1950 | 16 | 31.7 |
| 1951 | 32 | 31.7 |
| 1952 | 46 | 31.7 |
| 1953 | 51 | 31.7 |
| 1954 | 29 | 31.7 |
| 1955 | 43 | 31.7 |
| 1956 | 15 | 31.7 |
| 1957 | 27 | 31.7 |
| 1958 | 10 | 31.7 |
| 1959 | 48 | 31.7 |
| 1960 | 18 | 25.7 |
| 1961 | 26 | 25.7 |
| 1962 | 28 | 25.7 |
| 1963 | 17 | 25.7 |
| 1964 | 33 | 25.7 |
| 1965 | 27 | 25.7 |
| 1966 | 32 | 25.7 |
| 1967 | 15 | 25.7 |
| 1968 | 36 | 25.7 |
| 1969 | 25 | 25.7 |
| 1970 | 36 | 23.9 |
| 1971 | 18 | 23.9 |
| 1972 | 14 | 23.9 |
| 1973 | 30 | 23.9 |
| 1974 | 14 | 23.9 |
| 1975 | 27 | 23.9 |
| 1976 | 22 | 23.9 |
| 1977 | 37 | 23.9 |
| 1978 | 22 | 23.9 |
| 1979 | 19 | 23.9 |
| 1980 | 42 | 38.2 |
| 1981 | 14 | 38.2 |
| 1982 | 27 | 38.2 |
| 1983 | 52 | 38.2 |
| 1984 | 31 | 38.2 |
| 1985 | 22 | 38.2 |
| 1986 | 25 | 38.2 |
| 1987 | 63 | 38.2 |
| 1988 | 64 | 38.2 |
| 1989 | 42 | 38.2 |
| 1990 | 60 | 51.6 |
| 1991 | 81 | 51.6 |
| 1992 | 23 | 51.6 |
| 1993 | 56 | 51.6 |
| 1994 | 44 | 51.6 |
| 1995 | 60 | 51.6 |
| 1996 | 40 | 51.6 |
| 1997 | 36 | 51.6 |
| 1998 | 52 | 51.6 |
| 1999 | 64 | 51.6 |
| 2000 | 33 | 27.9 |
| 2001 | 32 | 27.9 |
| 2002 | 48 | 27.9 |
| 2003 | 13 | 27.9 |
| 2004 | 10 | 27.9 |
| 2005 | 51 | 27.9 |
| 2006 | 28 | 27.9 |
| 2007 | 37 | 27.9 |
| 2008 | 16 | 27.9 |
| 2009 | 11 | 27.9 |
| 2010 | 43 | 29.7 |
| 2011 | 27 | 29.7 |
| 2012 | 37 | 29.7 |
| 2013 | 18 | 29.7 |
| 2014 | 15 | 29.7 |
| 2015 | 22 | 29.7 |
| 2016 | 34 | 29.7 |
| 2017 | 28 | 29.7 |
| 2018 | 31 | 29.7 |
| 2019 | 42 | 29.7 |
| 2020 | 41 | 27.1 |
| 2021 | 30 | 27.1 |
| 2022 | 24 | 27.1 |
| 2023 | 10 | 27.1 |
| 2024 | 34 | 27.1 |
| 2025 | 30 | 27.1 |
| 2026 | 21 | 27.1 |
| Year | First date | Last date |
|---|---|---|
| 1947 | 1947-05-28 | 1947-09-15 |
| 1948 | 1948-05-12 | 1948-09-04 |
| 1949 | 1949-05-05 | 1949-10-11 |
| 1950 | 1950-05-06 | 1950-08-28 |
| 1951 | 1951-06-02 | 1951-10-06 |
| 1952 | 1952-06-07 | 1952-09-15 |
| 1953 | 1953-06-06 | 1953-10-01 |
| 1954 | 1954-05-03 | 1954-09-30 |
| 1955 | 1955-05-22 | 1955-09-19 |
| 1956 | 1956-06-14 | 1956-09-02 |
| 1957 | 1957-04-25 | 1957-09-13 |
| 1958 | 1958-06-02 | 1958-09-07 |
| 1959 | 1959-05-21 | 1959-10-07 |
| 1960 | 1960-04-24 | 1960-09-09 |
| 1961 | 1961-06-12 | 1961-09-26 |
| 1962 | 1962-04-28 | 1962-09-14 |
| 1963 | 1963-05-10 | 1963-08-01 |
| 1964 | 1964-05-20 | 1964-09-12 |
| 1965 | 1965-06-07 | 1965-09-23 |
| 1966 | 1966-06-10 | 1966-08-11 |
| 1967 | 1967-06-09 | 1967-07-28 |
| 1968 | 1968-06-07 | 1968-09-05 |
| 1969 | 1969-05-30 | 1969-09-08 |
| 1970 | 1970-04-30 | 1970-09-27 |
| 1971 | 1971-05-19 | 1971-09-11 |
| 1972 | 1972-07-12 | 1972-08-27 |
| 1973 | 1973-06-11 | 1973-09-06 |
| 1974 | 1974-05-15 | 1974-08-28 |
| 1975 | 1975-05-22 | 1975-08-27 |
| 1976 | 1976-04-18 | 1976-09-10 |
| 1977 | 1977-05-18 | 1977-09-05 |
| 1978 | 1978-05-31 | 1978-09-22 |
| 1979 | 1979-05-09 | 1979-08-29 |
| 1980 | 1980-05-30 | 1980-09-14 |
| 1981 | 1981-06-16 | 1981-08-30 |
| 1982 | 1982-05-19 | 1982-09-15 |
| 1983 | 1983-06-12 | 1983-09-21 |
| 1984 | 1984-05-23 | 1984-09-23 |
| 1985 | 1985-04-22 | 1985-09-11 |
| 1986 | 1986-04-29 | 1986-08-27 |
| 1987 | 1987-04-22 | 1987-09-11 |
| 1988 | 1988-05-24 | 1988-09-13 |
| 1989 | 1989-05-19 | 1989-09-21 |
| 1990 | 1990-04-25 | 1990-09-12 |
| 1991 | 1991-05-13 | 1991-09-19 |
| 1992 | 1992-05-13 | 1992-09-10 |
| 1993 | 1993-05-10 | 1993-09-15 |
| 1994 | 1994-04-27 | 1994-09-25 |
| 1995 | 1995-05-11 | 1995-09-08 |
| 1996 | 1996-04-23 | 1996-09-03 |
| 1997 | 1997-05-20 | 1997-09-03 |
| 1998 | 1998-04-01 | 1998-09-28 |
| 1999 | 1999-05-08 | 1999-09-27 |
| 2000 | 2000-05-07 | 2000-09-24 |
| 2001 | 2001-04-24 | 2001-09-09 |
| 2002 | 2002-04-17 | 2002-09-21 |
| 2003 | 2003-06-25 | 2003-08-22 |
| 2004 | 2004-06-10 | 2004-08-30 |
| 2005 | 2005-06-07 | 2005-09-26 |
| 2006 | 2006-05-29 | 2006-08-26 |
| 2007 | 2007-05-10 | 2007-09-26 |
| 2008 | 2008-06-07 | 2008-09-15 |
| 2009 | 2009-04-26 | 2009-08-18 |
| 2010 | 2010-04-03 | 2010-09-25 |
| 2011 | 2011-05-30 | 2011-09-04 |
| 2012 | 2012-05-04 | 2012-09-08 |
| 2013 | 2013-05-31 | 2013-10-07 |
| 2014 | 2014-05-14 | 2014-09-06 |
| 2015 | 2015-05-09 | 2015-09-10 |
| 2016 | 2016-05-28 | 2016-09-11 |
| 2017 | 2017-05-01 | 2017-09-28 |
| 2018 | 2018-04-14 | 2018-09-06 |
| 2019 | 2019-05-02 | 2019-10-04 |
| 2020 | 2020-05-26 | 2020-09-09 |
| 2021 | 2021-05-21 | 2021-08-30 |
| 2022 | 2022-05-22 | 2022-08-30 |
| 2023 | 2023-06-03 | 2023-09-07 |
| 2024 | 2024-05-06 | 2024-08-31 |
| 2025 | 2025-06-05 | 2025-09-20 |
| 2026 | 2026-05-19 | 2026-09-17 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 80 | 81 | 1991 | 21 |
| 35 C (95 F): Days | 24 | 29 | 1988 | 1 |
| 40 C (104 F): Days | 1 | 1 | 1988 | 1 |
| 90 F (32.2 C): Days | 74 | 50 | 1988 | 4 |
| 100 F (37.8 C): Days | 3 | 7 | 1988 | 1 |
| 0 C (32 F): Ice days (max | 80 | 60 | 2010 | 31 |
| 0 C (32 F): Frost days (min | 80 | 192 | 1994 | 90 |
| -10 C (14 F): Days with min | 80 | 61 | 1995 | 30 |
| -20 C (-4 F): Days with min | 60 | 16 | 1978 | 4 |
| -30 C (-22 F): Days with min | 3 | 3 | 1994 | 3 |
| 20 C (68 F): Tropical nights (min | 42 | 11 | 2016 | 3 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 80 | 66 | 2018 | 37 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 80 | 22 | 2017 | 10 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 43 | 4 | 2017 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 3 | 1 | 1954 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 67 | 12 | 2010 | 4 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 19 | 3 | 2010 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 2 | 1 | 1995 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.
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).