Wiseman Threshold Days by Year (USC00509869)
14 fixed thresholds counted per year at Wiseman (USC00509869): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Wiseman Thresholds
- Wiseman: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1948 with 267.
- Wiseman: nights with a minimum temperature at or below -10 C (14 F) in 34 years, most in 1948 with 196.
- Wiseman: nights with a minimum temperature at or below -20 C (-4 F) in 34 years, most in 1999 with 138.
- Wiseman: nights with a minimum temperature at or below -30 C (-22 F) in 34 years, most in 1999 with 80.
- 14 fixed thresholds have at least one qualifying day at Wiseman.
Days at or above 30 C (86 F)
8 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1920 | 1 | 1 |
| 1937 | 3 | 2.3 |
| 1938 | 3 | 2.3 |
| 1939 | 1 | 2.3 |
| 1940 | 2 | 2 |
| 1999 | 1 | 1 |
| 2019 | 3 | 3 |
| 2025 | 4 | 4 |
| Year | First date | Last date |
|---|---|---|
| 1920 | 1920-08-01 | 1920-08-01 |
| 1937 | 1937-06-19 | 1937-06-21 |
| 1938 | 1938-06-25 | 1938-06-27 |
| 1939 | 1939-07-20 | 1939-07-20 |
| 1940 | 1940-07-12 | 1940-07-13 |
| 1999 | 1999-06-13 | 1999-06-13 |
| 2019 | 2019-07-09 | 2019-07-11 |
| 2025 | 2025-06-19 | 2025-07-07 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 8 | 4 | 2025 | 4 |
| 90 F (32.2 C): Days | 1 | 1 | 2025 | 1 |
| 0 C (32 F): Ice days (max | 30 | 193 | 2023 | 113 |
| 0 C (32 F): Frost days (min | 34 | 267 | 1948 | 174 |
| -10 C (14 F): Days with min | 34 | 196 | 1948 | 117 |
| -20 C (-4 F): Days with min | 34 | 138 | 1999 | 82 |
| -30 C (-22 F): Days with min | 34 | 80 | 1999 | 47 |
| -40 C (-40 F): Days with min | 34 | 25 | 1999 | 12 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 31 | 14 | 1998 | 10 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 21 | 3 | 1998 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 3 | 1 | 2025 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 26 | 9 | 2019 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 16 | 4 | 2000 | 1 |
| 50 cm (19.7 in): Days with 50 cm or more snowfall | 4 | 1 | 1999 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.
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).