Seattle UNIV of Washin Threshold Days by Year (USC00457478)
12 fixed thresholds counted per year at Seattle UNIV of Washin (USC00457478): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Seattle UNIV of Washin Thresholds
- Seattle UNIV of Washin: nights with a minimum temperature at or below 0 C (32 F) in 62 years, most in 1916 with 64.
- Seattle UNIV of Washin: days with a maximum temperature at or above 30 C (86 F) in 60 years, most in 1981 with 22.
- Seattle UNIV of Washin: days with a maximum temperature at or above 90 F (32.2 C) in 49 years, most in 1981 with 14.
- Seattle UNIV of Washin: days with 10 mm (0.39 in) or more of precipitation in 49 years, most in 1968 with 48.
- 12 fixed thresholds have at least one qualifying day at Seattle UNIV of Washin.
Days at or above 30 C (86 F)
60 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1909 | 1 | 1 |
| 1910 | 2 | 4 |
| 1911 | 6 | 4 |
| 1912 | 4 | 4 |
| 1913 | 4 | 4 |
| 1915 | 8 | 4 |
| 1916 | 3 | 4 |
| 1917 | 2 | 4 |
| 1918 | 3 | 4 |
| 1922 | 7 | 4.1 |
| 1923 | 3 | 4.1 |
| 1924 | 4 | 4.1 |
| 1925 | 1 | 4.1 |
| 1926 | 5 | 4.1 |
| 1927 | 7 | 4.1 |
| 1928 | 5 | 4.1 |
| 1929 | 1 | 4.1 |
| 1930 | 3 | 7.1 |
| 1932 | 8 | 7.1 |
| 1933 | 5 | 7.1 |
| 1934 | 7 | 7.1 |
| 1935 | 12 | 7.1 |
| 1936 | 3 | 7.1 |
| 1937 | 5 | 7.1 |
| 1938 | 10 | 7.1 |
| 1939 | 11 | 7.1 |
| 1940 | 1 | 6.6 |
| 1941 | 9 | 6.6 |
| 1942 | 11 | 6.6 |
| 1943 | 5 | 6.6 |
| 1944 | 8 | 6.6 |
| 1945 | 11 | 6.6 |
| 1946 | 4 | 6.6 |
| 1948 | 3 | 6.6 |
| 1949 | 7 | 6.6 |
| 1950 | 9 | 11.6 |
| 1951 | 14 | 11.6 |
| 1952 | 12 | 11.6 |
| 1953 | 12 | 11.6 |
| 1955 | 9 | 11.6 |
| 1956 | 19 | 11.6 |
| 1959 | 6 | 11.6 |
| 1963 | 5 | 9.8 |
| 1965 | 11 | 9.8 |
| 1966 | 5 | 9.8 |
| 1967 | 20 | 9.8 |
| 1968 | 12 | 9.8 |
| 1969 | 6 | 9.8 |
| 1970 | 9 | 12.8 |
| 1971 | 15 | 12.8 |
| 1972 | 21 | 12.8 |
| 1973 | 11 | 12.8 |
| 1974 | 13 | 12.8 |
| 1975 | 7 | 12.8 |
| 1976 | 2 | 12.8 |
| 1977 | 19 | 12.8 |
| 1978 | 18 | 12.8 |
| 1980 | 10 | 17.7 |
| 1981 | 22 | 17.7 |
| 1982 | 21 | 17.7 |
| Year | First date | Last date |
|---|---|---|
| 1909 | 1909-06-10 | 1909-06-10 |
| 1910 | 1910-07-10 | 1910-07-11 |
| 1911 | 1911-07-14 | 1911-07-24 |
| 1912 | 1912-05-13 | 1912-07-18 |
| 1913 | 1913-07-21 | 1913-08-21 |
| 1915 | 1915-05-06 | 1915-08-21 |
| 1916 | 1916-08-24 | 1916-08-26 |
| 1917 | 1917-06-13 | 1917-08-12 |
| 1918 | 1918-07-17 | 1918-08-31 |
| 1922 | 1922-05-29 | 1922-07-06 |
| 1923 | 1923-06-28 | 1923-08-17 |
| 1924 | 1924-06-28 | 1924-09-12 |
| 1925 | 1925-06-26 | 1925-06-26 |
| 1926 | 1926-06-25 | 1926-07-13 |
| 1927 | 1927-07-17 | 1927-08-18 |
| 1928 | 1928-07-23 | 1928-07-27 |
| 1929 | 1929-09-13 | 1929-09-13 |
| 1930 | 1930-06-16 | 1930-08-12 |
| 1932 | 1932-06-10 | 1932-10-04 |
| 1933 | 1933-07-15 | 1933-08-26 |
| 1934 | 1934-04-19 | 1934-09-02 |
| 1935 | 1935-06-06 | 1935-09-08 |
| 1936 | 1936-05-26 | 1936-08-28 |
| 1937 | 1937-06-01 | 1937-09-14 |
| 1938 | 1938-07-14 | 1938-09-17 |
| 1939 | 1939-07-23 | 1939-08-23 |
| 1940 | 1940-06-25 | 1940-06-25 |
| 1941 | 1941-06-12 | 1941-08-20 |
| 1942 | 1942-07-01 | 1942-08-23 |
| 1943 | 1943-07-24 | 1943-09-25 |
| 1944 | 1944-05-27 | 1944-09-11 |
| 1945 | 1945-05-03 | 1945-08-07 |
| 1946 | 1946-07-21 | 1946-09-11 |
| 1948 | 1948-06-07 | 1948-07-31 |
| 1949 | 1949-06-05 | 1949-09-06 |
| 1950 | 1950-07-21 | 1950-09-21 |
| 1951 | 1951-06-25 | 1951-09-15 |
| 1952 | 1952-07-08 | 1952-09-22 |
| 1953 | 1953-05-04 | 1953-09-05 |
| 1955 | 1955-06-08 | 1955-09-05 |
| 1956 | 1956-05-17 | 1956-09-06 |
| 1959 | 1959-06-02 | 1959-08-01 |
| 1963 | 1963-05-19 | 1963-06-15 |
| 1965 | 1965-07-01 | 1965-08-19 |
| 1966 | 1966-06-16 | 1966-08-22 |
| 1967 | 1967-06-18 | 1967-09-28 |
| 1968 | 1968-07-02 | 1968-08-11 |
| 1969 | 1969-05-23 | 1969-07-24 |
| 1970 | 1970-06-02 | 1970-08-12 |
| 1971 | 1971-05-12 | 1971-08-12 |
| 1972 | 1972-05-28 | 1972-09-04 |
| 1973 | 1973-05-14 | 1973-09-06 |
| 1974 | 1974-07-29 | 1974-09-25 |
| 1975 | 1975-06-02 | 1975-09-23 |
| 1976 | 1976-05-01 | 1976-09-21 |
| 1977 | 1977-06-07 | 1977-08-18 |
| 1978 | 1978-05-20 | 1978-08-09 |
| 1980 | 1980-07-21 | 1980-10-06 |
| 1981 | 1981-07-04 | 1981-09-16 |
| 1982 | 1982-06-10 | 1982-09-03 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 60 | 22 | 1981 | 21 |
| 35 C (95 F): Days | 17 | 7 | 1981 | 3 |
| 90 F (32.2 C): Days | 49 | 14 | 1981 | 7 |
| 100 F (37.8 C): Days | 1 | 3 | 1981 | 3 |
| 0 C (32 F): Ice days (max | 41 | 18 | 1950 | 1 |
| 0 C (32 F): Frost days (min | 62 | 64 | 1916 | 39 |
| -10 C (14 F): Days with min | 14 | 14 | 1950 | 1 |
| 20 C (68 F): Tropical nights (min | 3 | 3 | 1941 | 3 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 49 | 48 | 1968 | 31 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 47 | 8 | 1933 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 9 | 2 | 1959 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 7 | 4 | 1950 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.
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).