Vashon Island Threshold Days by Year (USC00458802)
13 fixed thresholds counted per year at Vashon Island (USC00458802): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Vashon Island Thresholds
- Vashon Island: nights with a minimum temperature at or below 0 C (32 F) in 42 years, most in 1916 with 72.
- Vashon Island: days with 10 mm (0.39 in) or more of precipitation in 42 years, most in 1953 with 59.
- Vashon Island: days with 25 mm (0.98 in) or more of precipitation in 41 years, most in 1954 with 16.
- Vashon Island: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 1942 with 13.
- 13 fixed thresholds have at least one qualifying day at Vashon Island.
Days at or above 30 C (86 F)
32 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1898 | 7 | 7 |
| 1902 | 1 | 1.3 |
| 1903 | 1 | 1.3 |
| 1904 | 3 | 1.3 |
| 1905 | 1 | 1.3 |
| 1906 | 1 | 1.3 |
| 1907 | 1 | 1.3 |
| 1911 | 2 | 3.8 |
| 1916 | 3 | 3.8 |
| 1917 | 9 | 3.8 |
| 1918 | 2 | 3.8 |
| 1919 | 3 | 3.8 |
| 1920 | 8 | 5.4 |
| 1922 | 3 | 5.4 |
| 1923 | 3 | 5.4 |
| 1924 | 4 | 5.4 |
| 1926 | 7 | 5.4 |
| 1927 | 9 | 5.4 |
| 1928 | 4 | 5.4 |
| 1937 | 3 | 3.5 |
| 1938 | 4 | 3.5 |
| 1940 | 4 | 6.1 |
| 1941 | 6 | 6.1 |
| 1942 | 13 | 6.1 |
| 1943 | 1 | 6.1 |
| 1944 | 13 | 6.1 |
| 1945 | 3 | 6.1 |
| 1949 | 3 | 6.1 |
| 1950 | 2 | 5 |
| 1951 | 7 | 5 |
| 1952 | 8 | 5 |
| 1953 | 3 | 5 |
| Year | First date | Last date |
|---|---|---|
| 1898 | 1898-07-30 | 1898-08-10 |
| 1902 | 1902-07-19 | 1902-07-19 |
| 1903 | 1903-06-08 | 1903-06-08 |
| 1904 | 1904-06-29 | 1904-09-07 |
| 1905 | 1905-07-27 | 1905-07-27 |
| 1906 | 1906-07-03 | 1906-07-03 |
| 1907 | 1907-07-30 | 1907-07-30 |
| 1911 | 1911-07-16 | 1911-07-24 |
| 1916 | 1916-08-24 | 1916-08-26 |
| 1917 | 1917-06-13 | 1917-08-28 |
| 1918 | 1918-08-31 | 1918-09-02 |
| 1919 | 1919-07-14 | 1919-08-16 |
| 1920 | 1920-06-03 | 1920-08-21 |
| 1922 | 1922-07-02 | 1922-07-06 |
| 1923 | 1923-07-14 | 1923-08-16 |
| 1924 | 1924-06-29 | 1924-09-12 |
| 1926 | 1926-05-12 | 1926-08-23 |
| 1927 | 1927-07-16 | 1927-08-18 |
| 1928 | 1928-07-11 | 1928-07-26 |
| 1937 | 1937-07-17 | 1937-09-16 |
| 1938 | 1938-07-16 | 1938-07-25 |
| 1940 | 1940-07-01 | 1940-08-18 |
| 1941 | 1941-07-14 | 1941-08-19 |
| 1942 | 1942-06-30 | 1942-08-19 |
| 1943 | 1943-07-21 | 1943-07-21 |
| 1944 | 1944-05-27 | 1944-09-10 |
| 1945 | 1945-06-20 | 1945-07-10 |
| 1949 | 1949-08-01 | 1949-08-29 |
| 1950 | 1950-08-26 | 1950-08-27 |
| 1951 | 1951-06-21 | 1951-07-12 |
| 1952 | 1952-07-09 | 1952-08-12 |
| 1953 | 1953-05-05 | 1953-07-11 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 32 | 13 | 1942 | 3 |
| 35 C (95 F): Days | 3 | 2 | 1942 | 1 |
| 90 F (32.2 C): Days | 18 | 7 | 1942 | 1 |
| 0 C (32 F): Ice days (max | 24 | 17 | 1950 | 2 |
| 0 C (32 F): Frost days (min | 42 | 72 | 1916 | 36 |
| -10 C (14 F): Days with min | 13 | 9 | 1950 | 9 |
| 20 C (68 F): Tropical nights (min | 2 | 3 | 1917 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 42 | 59 | 1953 | 32 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 41 | 16 | 1954 | 16 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 22 | 3 | 1945 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 1906 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 8 | 2 | 1943 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 2 | 1 | 1943 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.
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 (2025-12-31).