Silverton Threshold Days by Year
15 fixed thresholds counted per year at Silverton (USC00057656): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Silverton Thresholds
- Silverton: days with a maximum temperature at or below 0 C (32 F) in 107 years, most in 1909 with 95.
- Silverton: days with 10 mm (0.39 in) or more of precipitation in 107 years, most in 1911 with 35.
- Silverton: nights with a minimum temperature at or below 0 C (32 F) in 106 years, most in 1989 with 323.
- Silverton: nights with a minimum temperature at or below -10 C (14 F) in 106 years, most in 1984 with 177.
- 15 fixed thresholds have at least one qualifying day at Silverton.
Days at or above 30 C (86 F)
15 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1917 | 1 | 1 |
| 1920 | 1 | 6 |
| 1922 | 9 | 6 |
| 1924 | 4 | 6 |
| 1925 | 1 | 6 |
| 1929 | 15 | 6 |
| 1931 | 2 | 1.5 |
| 1932 | 1 | 1.5 |
| 1989 | 3 | 3 |
| 2003 | 1 | 1 |
| 2013 | 1 | 1 |
| 2016 | 1 | 1 |
| 2021 | 1 | 1 |
| 2023 | 1 | 1 |
| 2025 | 1 | 1 |
| Year | First date | Last date |
|---|---|---|
| 1917 | 1917-07-13 | 1917-07-13 |
| 1920 | 1920-08-07 | 1920-08-07 |
| 1922 | 1922-07-12 | 1922-09-04 |
| 1924 | 1924-06-15 | 1924-08-02 |
| 1925 | 1925-08-03 | 1925-08-03 |
| 1929 | 1929-06-19 | 1929-07-22 |
| 1931 | 1931-07-13 | 1931-07-23 |
| 1932 | 1932-07-07 | 1932-07-07 |
| 1989 | 1989-07-05 | 1989-07-07 |
| 2003 | 2003-07-12 | 2003-07-12 |
| 2013 | 2013-06-27 | 2013-06-27 |
| 2016 | 2016-06-20 | 2016-06-20 |
| 2021 | 2021-06-15 | 2021-06-15 |
| 2023 | 2023-07-17 | 2023-07-17 |
| 2025 | 2025-08-21 | 2025-08-21 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 15 | 15 | 1929 | 1 |
| 35 C (95 F): Days | 1 | 1 | 1929 | 1 |
| 90 F (32.2 C): Days | 4 | 6 | 1929 | 6 |
| 0 C (32 F): Ice days (max | 107 | 95 | 1909 | 13 |
| 0 C (32 F): Frost days (min | 106 | 323 | 1989 | 120 |
| -10 C (14 F): Days with min | 106 | 177 | 1984 | 59 |
| -20 C (-4 F): Days with min | 106 | 89 | 1991 | 12 |
| -30 C (-22 F): Days with min | 85 | 14 | 1984 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 107 | 35 | 1911 | 3 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 89 | 8 | 1905 | 5 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 18 | 1 | 1905 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1911 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 106 | 24 | 1911 | 7 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 88 | 8 | 1906 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 8 | 1 | 1919 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.
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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2026-10-12).