Sion 2 Threshold Days by Year (SZE00105086)
12 fixed thresholds counted per year at Sion 2 (SZE00105086): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Sion 2 Thresholds
- Sion 2: days with 10 mm (0.39 in) or more of precipitation in 126 years, most in 1965 with 32.
- Sion 2: days with 25 mm (0.98 in) or more of precipitation in 118 years, most in 1974 with 8.
- Sion 2: days with a maximum temperature at or above 30 C (86 F) in 70 years, most in 2018 with 49.
- Sion 2: days with a maximum temperature at or below 0 C (32 F) in 66 years, most in 1963 with 30.
- 12 fixed thresholds have at least one qualifying day at Sion 2.
Days at or above 30 C (86 F)
70 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1955 | 2 | 7.4 |
| 1956 | 3 | 7.4 |
| 1957 | 11 | 7.4 |
| 1958 | 9 | 7.4 |
| 1959 | 12 | 7.4 |
| 1960 | 4 | 13.8 |
| 1961 | 16 | 13.8 |
| 1962 | 23 | 13.8 |
| 1963 | 12 | 13.8 |
| 1965 | 9 | 13.8 |
| 1966 | 16 | 13.8 |
| 1967 | 17 | 13.8 |
| 1968 | 12 | 13.8 |
| 1969 | 15 | 13.8 |
| 1970 | 18 | 13.6 |
| 1971 | 23 | 13.6 |
| 1972 | 12 | 13.6 |
| 1973 | 14 | 13.6 |
| 1974 | 11 | 13.6 |
| 1975 | 17 | 13.6 |
| 1976 | 22 | 13.6 |
| 1977 | 2 | 13.6 |
| 1979 | 3 | 13.6 |
| 1980 | 1 | 9.6 |
| 1981 | 11 | 9.6 |
| 1982 | 6 | 9.6 |
| 1983 | 18 | 9.6 |
| 1984 | 8 | 9.6 |
| 1985 | 7 | 9.6 |
| 1986 | 14 | 9.6 |
| 1987 | 7 | 9.6 |
| 1988 | 15 | 9.6 |
| 1989 | 9 | 9.6 |
| 1990 | 16 | 11.8 |
| 1991 | 12 | 11.8 |
| 1992 | 19 | 11.8 |
| 1993 | 8 | 11.8 |
| 1994 | 20 | 11.8 |
| 1995 | 11 | 11.8 |
| 1996 | 7 | 11.8 |
| 1997 | 2 | 11.8 |
| 1998 | 15 | 11.8 |
| 1999 | 8 | 11.8 |
| 2000 | 13 | 18.7 |
| 2001 | 12 | 18.7 |
| 2002 | 13 | 18.7 |
| 2003 | 43 | 18.7 |
| 2004 | 12 | 18.7 |
| 2005 | 17 | 18.7 |
| 2006 | 25 | 18.7 |
| 2007 | 7 | 18.7 |
| 2008 | 16 | 18.7 |
| 2009 | 29 | 18.7 |
| 2010 | 22 | 31.4 |
| 2011 | 24 | 31.4 |
| 2012 | 22 | 31.4 |
| 2013 | 32 | 31.4 |
| 2014 | 14 | 31.4 |
| 2015 | 45 | 31.4 |
| 2016 | 27 | 31.4 |
| 2017 | 41 | 31.4 |
| 2018 | 49 | 31.4 |
| 2019 | 38 | 31.4 |
| 2020 | 24 | 33.1 |
| 2021 | 12 | 33.1 |
| 2022 | 49 | 33.1 |
| 2023 | 38 | 33.1 |
| 2024 | 30 | 33.1 |
| 2025 | 36 | 33.1 |
| 2026 | 43 | 33.1 |
| Year | First date | Last date |
|---|---|---|
| 1955 | 1955-07-17 | 1955-07-18 |
| 1956 | 1956-05-28 | 1956-08-10 |
| 1957 | 1957-06-29 | 1957-08-07 |
| 1958 | 1958-05-10 | 1958-08-30 |
| 1959 | 1959-06-19 | 1959-08-10 |
| 1960 | 1960-05-15 | 1960-08-25 |
| 1961 | 1961-06-19 | 1961-09-18 |
| 1962 | 1962-05-08 | 1962-09-12 |
| 1963 | 1963-06-21 | 1963-08-03 |
| 1965 | 1965-06-21 | 1965-08-07 |
| 1966 | 1966-06-10 | 1966-09-12 |
| 1967 | 1967-06-23 | 1967-08-02 |
| 1968 | 1968-04-21 | 1968-07-10 |
| 1969 | 1969-05-12 | 1969-08-07 |
| 1970 | 1970-06-22 | 1970-09-10 |
| 1971 | 1971-05-09 | 1971-08-19 |
| 1972 | 1972-07-08 | 1972-08-13 |
| 1973 | 1973-06-17 | 1973-09-04 |
| 1974 | 1974-07-09 | 1974-08-17 |
| 1975 | 1975-05-19 | 1975-09-17 |
| 1976 | 1976-06-13 | 1976-08-07 |
| 1977 | 1977-06-13 | 1977-07-12 |
| 1979 | 1979-07-19 | 1979-07-29 |
| 1980 | 1980-08-02 | 1980-08-02 |
| 1981 | 1981-06-01 | 1981-08-16 |
| 1982 | 1982-07-09 | 1982-08-12 |
| 1983 | 1983-06-04 | 1983-07-31 |
| 1984 | 1984-07-09 | 1984-08-03 |
| 1985 | 1985-07-14 | 1985-08-24 |
| 1986 | 1986-06-22 | 1986-08-03 |
| 1987 | 1987-06-30 | 1987-09-16 |
| 1988 | 1988-07-05 | 1988-08-19 |
| 1989 | 1989-06-19 | 1989-08-16 |
| 1990 | 1990-06-19 | 1990-08-20 |
| 1991 | 1991-06-15 | 1991-08-26 |
| 1992 | 1992-05-15 | 1992-08-28 |
| 1993 | 1993-06-07 | 1993-08-22 |
| 1994 | 1994-06-01 | 1994-08-22 |
| 1995 | 1995-06-20 | 1995-08-05 |
| 1996 | 1996-06-06 | 1996-08-01 |
| 1997 | 1997-08-05 | 1997-08-11 |
| 1998 | 1998-06-05 | 1998-08-12 |
| 1999 | 1999-05-27 | 1999-08-06 |
| 2000 | 2000-06-09 | 2000-08-26 |
| 2001 | 2001-05-28 | 2001-08-27 |
| 2002 | 2002-06-14 | 2002-07-30 |
| 2003 | 2003-05-31 | 2003-08-27 |
| 2004 | 2004-06-08 | 2004-08-18 |
| 2005 | 2005-05-27 | 2005-07-28 |
| 2006 | 2006-06-14 | 2006-07-30 |
| 2007 | 2007-06-19 | 2007-08-15 |
| 2008 | 2008-06-22 | 2008-08-05 |
| 2009 | 2009-05-24 | 2009-09-01 |
| 2010 | 2010-05-25 | 2010-08-26 |
| 2011 | 2011-05-26 | 2011-09-11 |
| 2012 | 2012-05-11 | 2012-08-29 |
| 2013 | 2013-06-07 | 2013-09-06 |
| 2014 | 2014-06-06 | 2014-07-19 |
| 2015 | 2015-05-13 | 2015-08-31 |
| 2016 | 2016-06-22 | 2016-08-28 |
| 2017 | 2017-05-27 | 2017-08-30 |
| 2018 | 2018-06-10 | 2018-09-17 |
| 2019 | 2019-06-02 | 2019-09-16 |
| 2020 | 2020-05-22 | 2020-08-26 |
| 2021 | 2021-06-12 | 2021-08-15 |
| 2022 | 2022-05-18 | 2022-08-25 |
| 2023 | 2023-06-18 | 2023-09-11 |
| 2024 | 2024-06-18 | 2024-09-07 |
| 2025 | 2025-05-31 | 2025-08-26 |
| 2026 | 2026-05-24 | 2026-08-27 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 70 | 49 | 2018 | 43 |
| 35 C (95 F): Days | 22 | 9 | 2003 | 12 |
| 90 F (32.2 C): Days | 61 | 30 | 2003 | 36 |
| 100 F (37.8 C): Days | 2 | 1 | 2015 | 1 |
| 0 C (32 F): Ice days (max | 66 | 30 | 1963 | 3 |
| 0 C (32 F): Frost days (min | 66 | 140 | 1982 | 45 |
| -10 C (14 F): Days with min | 42 | 17 | 1981 | 3 |
| -20 C (-4 F): Days with min | 1 | 1 | 1979 | 1 |
| 20 C (68 F): Tropical nights (min | 9 | 5 | 2015 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 126 | 32 | 1965 | 14 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 118 | 8 | 1974 | 7 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 17 | 2 | 1910 | 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).