Swan Valley Threshold Days by Year
17 fixed thresholds counted per year at Swan Valley (USC00108937): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Swan Valley Thresholds
- Swan Valley: days with 10 mm (0.39 in) or more of precipitation in 64 years, most in 1993 with 21.
- Swan Valley: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1979 with 239.
- Swan Valley: nights with a minimum temperature at or below -10 C (14 F) in 62 years, most in 1985 with 106.
- Swan Valley: nights with a minimum temperature at or below -20 C (-4 F) in 61 years, most in 1985 with 29.
- 17 fixed thresholds have at least one qualifying day at Swan Valley.
Days at or above 30 C (86 F)
56 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1961 | 43 | 37.2 |
| 1962 | 24 | 37.2 |
| 1963 | 30 | 37.2 |
| 1967 | 44 | 37.2 |
| 1968 | 35 | 37.2 |
| 1969 | 47 | 37.2 |
| 1970 | 38 | 29.8 |
| 1971 | 38 | 29.8 |
| 1972 | 15 | 29.8 |
| 1973 | 29 | 29.8 |
| 1974 | 41 | 29.8 |
| 1975 | 24 | 29.8 |
| 1976 | 27 | 29.8 |
| 1977 | 29 | 29.8 |
| 1978 | 28 | 29.8 |
| 1979 | 29 | 29.8 |
| 1980 | 12 | 32.3 |
| 1981 | 37 | 32.3 |
| 1982 | 18 | 32.3 |
| 1983 | 24 | 32.3 |
| 1984 | 21 | 32.3 |
| 1985 | 35 | 32.3 |
| 1986 | 30 | 32.3 |
| 1987 | 25 | 32.3 |
| 1988 | 71 | 32.3 |
| 1989 | 50 | 32.3 |
| 1990 | 60 | 34.1 |
| 1991 | 51 | 34.1 |
| 1992 | 26 | 34.1 |
| 1994 | 46 | 34.1 |
| 1995 | 17 | 34.1 |
| 1996 | 28 | 34.1 |
| 1997 | 18 | 34.1 |
| 1998 | 41 | 34.1 |
| 1999 | 20 | 34.1 |
| 2000 | 40 | 36 |
| 2004 | 18 | 36 |
| 2006 | 37 | 36 |
| 2007 | 56 | 36 |
| 2008 | 29 | 36 |
| 2010 | 20 | 28.2 |
| 2011 | 23 | 28.2 |
| 2012 | 52 | 28.2 |
| 2014 | 14 | 28.2 |
| 2015 | 21 | 28.2 |
| 2016 | 26 | 28.2 |
| 2017 | 37 | 28.2 |
| 2018 | 27 | 28.2 |
| 2019 | 34 | 28.2 |
| 2020 | 38 | 52.4 |
| 2021 | 42 | 52.4 |
| 2022 | 53 | 52.4 |
| 2023 | 42 | 52.4 |
| 2024 | 71 | 52.4 |
| 2025 | 63 | 52.4 |
| 2026 | 58 | 52.4 |
| Year | First date | Last date |
|---|---|---|
| 1961 | 1961-06-11 | 1961-08-23 |
| 1962 | 1962-06-23 | 1962-09-18 |
| 1963 | 1963-07-01 | 1963-09-12 |
| 1967 | 1967-07-10 | 1967-09-05 |
| 1968 | 1968-06-18 | 1968-08-08 |
| 1969 | 1969-06-04 | 1969-09-09 |
| 1970 | 1970-06-21 | 1970-08-31 |
| 1971 | 1971-06-21 | 1971-08-27 |
| 1972 | 1972-07-06 | 1972-08-28 |
| 1973 | 1973-06-09 | 1973-08-20 |
| 1974 | 1974-06-12 | 1974-09-04 |
| 1975 | 1975-07-02 | 1975-08-07 |
| 1976 | 1976-06-29 | 1976-09-05 |
| 1977 | 1977-06-01 | 1977-09-07 |
| 1978 | 1978-07-01 | 1978-09-05 |
| 1979 | 1979-06-12 | 1979-09-18 |
| 1980 | 1980-06-10 | 1980-09-06 |
| 1981 | 1981-06-25 | 1981-09-18 |
| 1982 | 1982-06-27 | 1982-08-22 |
| 1983 | 1983-07-05 | 1983-09-01 |
| 1984 | 1984-06-28 | 1984-09-19 |
| 1985 | 1985-06-07 | 1985-08-30 |
| 1986 | 1986-05-30 | 1986-08-28 |
| 1987 | 1987-06-14 | 1987-09-24 |
| 1988 | 1988-06-03 | 1988-09-09 |
| 1989 | 1989-06-15 | 1989-09-16 |
| 1990 | 1990-06-22 | 1990-09-15 |
| 1991 | 1991-07-03 | 1991-09-06 |
| 1992 | 1992-05-06 | 1992-08-21 |
| 1994 | 1994-06-19 | 1994-09-09 |
| 1995 | 1995-07-08 | 1995-09-16 |
| 1996 | 1996-07-02 | 1996-09-11 |
| 1997 | 1997-07-09 | 1997-09-01 |
| 1998 | 1998-07-02 | 1998-09-08 |
| 1999 | 1999-07-06 | 1999-08-27 |
| 2000 | 2000-06-04 | 2000-09-16 |
| 2004 | 2004-07-13 | 2004-09-01 |
| 2006 | 2006-05-16 | 2006-09-04 |
| 2007 | 2007-06-20 | 2007-09-04 |
| 2008 | 2008-06-29 | 2008-08-25 |
| 2010 | 2010-06-29 | 2010-10-03 |
| 2011 | 2011-06-28 | 2011-08-27 |
| 2012 | 2012-06-04 | 2012-09-09 |
| 2014 | 2014-07-05 | 2014-08-12 |
| 2015 | 2015-06-27 | 2015-09-26 |
| 2016 | 2016-06-07 | 2016-09-02 |
| 2017 | 2017-06-05 | 2017-09-13 |
| 2018 | 2018-07-06 | 2018-09-07 |
| 2019 | 2019-07-03 | 2019-09-06 |
| 2020 | 2020-05-30 | 2020-09-18 |
| 2021 | 2021-06-04 | 2021-09-11 |
| 2022 | 2022-07-07 | 2022-09-28 |
| 2023 | 2023-05-21 | 2023-08-31 |
| 2024 | 2024-06-07 | 2024-10-05 |
| 2025 | 2025-05-11 | 2025-09-05 |
| 2026 | 2026-05-12 | 2026-10-06 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 56 | 71 | 1988 | 58 |
| 35 C (95 F): Days | 29 | 21 | 1990 | 21 |
| 40 C (104 F): Days | 1 | 0 | n/a | 1 |
| 90 F (32.2 C): Days | 56 | 50 | 1988 | 36 |
| 100 F (37.8 C): Days | 10 | 4 | 2022 | 4 |
| 0 C (32 F): Ice days (max | 57 | 80 | 2022 | 9 |
| 0 C (32 F): Frost days (min | 62 | 239 | 1979 | 104 |
| -10 C (14 F): Days with min | 62 | 106 | 1985 | 19 |
| -20 C (-4 F): Days with min | 61 | 29 | 1985 | 14 |
| -30 C (-22 F): Days with min | 28 | 8 | 1979 | 1 |
| -40 C (-40 F): Days with min | 3 | 2 | 1990 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 64 | 21 | 1993 | 10 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 31 | 4 | 2011 | 1 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 2004 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 33 | 13 | 1975 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 7 | 3 | 1988 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 1 | 1 | 2024 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.
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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-14).