Lake Yellowstone Threshold Days by Year (USC00485345)
13 fixed thresholds counted per year at Lake Yellowstone (USC00485345): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Lake Yellowstone Thresholds
- Lake Yellowstone: days with a maximum temperature at or below 0 C (32 F) in 78 years, most in 1948 with 134.
- Lake Yellowstone: nights with a minimum temperature at or below 0 C (32 F) in 78 years, most in 1975 with 318.
- Lake Yellowstone: nights with a minimum temperature at or below -10 C (14 F) in 78 years, most in 1985 with 166.
- Lake Yellowstone: nights with a minimum temperature at or below -20 C (-4 F) in 78 years, most in 1985 with 84.
- 13 fixed thresholds have at least one qualifying day at Lake Yellowstone.
Days at or above 30 C (86 F)
13 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1904 | 1 | 1.3 |
| 1905 | 2 | 1.3 |
| 1909 | 1 | 1.3 |
| 1914 | 1 | 1 |
| 1940 | 1 | 1 |
| 1955 | 1 | 1 |
| 1956 | 1 | 1 |
| 1969 | 1 | 1 |
| 1989 | 1 | 1 |
| 2002 | 4 | 4 |
| 2018 | 1 | 1 |
| 2021 | 2 | 2 |
| 2026 | 2 | 2 |
| Year | First date | Last date |
|---|---|---|
| 1904 | 1904-08-23 | 1904-08-23 |
| 1905 | 1905-07-10 | 1905-08-25 |
| 1909 | 1909-07-02 | 1909-07-02 |
| 1914 | 1914-09-03 | 1914-09-03 |
| 1940 | 1940-08-14 | 1940-08-14 |
| 1955 | 1955-07-17 | 1955-07-17 |
| 1956 | 1956-07-27 | 1956-07-27 |
| 1969 | 1969-08-10 | 1969-08-10 |
| 1989 | 1989-08-01 | 1989-08-01 |
| 2002 | 2002-07-13 | 2002-07-16 |
| 2018 | 2018-08-13 | 2018-08-13 |
| 2021 | 2021-07-19 | 2021-07-21 |
| 2026 | 2026-07-13 | 2026-07-15 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 13 | 4 | 2002 | 2 |
| 90 F (32.2 C): Days | 1 | 1 | 1969 | 1 |
| 0 C (32 F): Ice days (max | 78 | 134 | 1948 | 29 |
| 0 C (32 F): Frost days (min | 78 | 318 | 1975 | 131 |
| -10 C (14 F): Days with min | 78 | 166 | 1985 | 39 |
| -20 C (-4 F): Days with min | 78 | 84 | 1985 | 6 |
| -30 C (-22 F): Days with min | 74 | 19 | 1932 | 6 |
| -40 C (-40 F): Days with min | 29 | 5 | 1985 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 78 | 29 | 1908 | 5 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 34 | 9 | 1908 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 1 | 1 | 1908 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 70 | 23 | 1964 | 5 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 27 | 3 | 1962 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.
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).