Washington Is Threshold Days by Year (USC00478905)
15 fixed thresholds counted per year at Washington Is (USC00478905): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Washington Is Thresholds
- Washington Is: nights with a minimum temperature at or below 0 C (32 F) in 80 years, most in 1976 with 187.
- Washington Is: nights with a minimum temperature at or below -10 C (14 F) in 80 years, most in 2014 with 83.
- Washington Is: days with a maximum temperature at or below 0 C (32 F) in 78 years, most in 2014 with 103.
- Washington Is: days with 10 mm (0.39 in) or more of precipitation in 76 years, most in 2019 with 37.
- 15 fixed thresholds have at least one qualifying day at Washington Is.
Days at or above 30 C (86 F)
56 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1945 | 4 | 8 |
| 1948 | 10 | 8 |
| 1949 | 10 | 8 |
| 1951 | 2 | 3.9 |
| 1952 | 1 | 3.9 |
| 1953 | 6 | 3.9 |
| 1955 | 14 | 3.9 |
| 1956 | 1 | 3.9 |
| 1958 | 1 | 3.9 |
| 1959 | 2 | 3.9 |
| 1963 | 1 | 3.4 |
| 1964 | 4 | 3.4 |
| 1965 | 2 | 3.4 |
| 1966 | 8 | 3.4 |
| 1967 | 1 | 3.4 |
| 1968 | 1 | 3.4 |
| 1969 | 7 | 3.4 |
| 1970 | 4 | 4.5 |
| 1972 | 3 | 4.5 |
| 1973 | 6 | 4.5 |
| 1974 | 4 | 4.5 |
| 1975 | 9 | 4.5 |
| 1976 | 5 | 4.5 |
| 1977 | 3 | 4.5 |
| 1979 | 2 | 4.5 |
| 1980 | 4 | 5.5 |
| 1981 | 3 | 5.5 |
| 1982 | 2 | 5.5 |
| 1983 | 14 | 5.5 |
| 1984 | 1 | 5.5 |
| 1985 | 1 | 5.5 |
| 1986 | 3 | 5.5 |
| 1987 | 7 | 5.5 |
| 1988 | 12 | 5.5 |
| 1989 | 8 | 5.5 |
| 1990 | 2 | 2.2 |
| 1991 | 1 | 2.2 |
| 1993 | 1 | 2.2 |
| 1995 | 2 | 2.2 |
| 1996 | 2 | 2.2 |
| 1999 | 5 | 2.2 |
| 2001 | 4 | 4.3 |
| 2002 | 2 | 4.3 |
| 2003 | 1 | 4.3 |
| 2005 | 9 | 4.3 |
| 2006 | 5 | 4.3 |
| 2007 | 5 | 4.3 |
| 2011 | 8 | 2.8 |
| 2012 | 3 | 2.8 |
| 2013 | 1 | 2.8 |
| 2015 | 3 | 2.8 |
| 2016 | 1 | 2.8 |
| 2018 | 1 | 2.8 |
| 2020 | 2 | 2.3 |
| 2021 | 2 | 2.3 |
| 2022 | 3 | 2.3 |
| Year | First date | Last date |
|---|---|---|
| 1945 | 1945-08-19 | 1945-08-29 |
| 1948 | 1948-06-01 | 1948-08-25 |
| 1949 | 1949-06-25 | 1949-08-26 |
| 1951 | 1951-07-15 | 1951-07-26 |
| 1952 | 1952-06-06 | 1952-06-06 |
| 1953 | 1953-08-26 | 1953-09-02 |
| 1955 | 1955-07-04 | 1955-08-21 |
| 1956 | 1956-06-12 | 1956-06-12 |
| 1958 | 1958-08-05 | 1958-08-05 |
| 1959 | 1959-07-31 | 1959-08-01 |
| 1963 | 1963-07-01 | 1963-07-01 |
| 1964 | 1964-06-26 | 1964-07-23 |
| 1965 | 1965-07-22 | 1965-08-14 |
| 1966 | 1966-06-29 | 1966-09-01 |
| 1967 | 1967-07-23 | 1967-07-23 |
| 1968 | 1968-08-22 | 1968-08-22 |
| 1969 | 1969-05-28 | 1969-08-30 |
| 1970 | 1970-06-29 | 1970-07-03 |
| 1972 | 1972-07-22 | 1972-08-19 |
| 1973 | 1973-07-07 | 1973-08-29 |
| 1974 | 1974-07-09 | 1974-07-19 |
| 1975 | 1975-07-01 | 1975-08-05 |
| 1976 | 1976-07-14 | 1976-08-27 |
| 1977 | 1977-05-13 | 1977-07-20 |
| 1979 | 1979-07-15 | 1979-08-07 |
| 1980 | 1980-07-10 | 1980-08-18 |
| 1981 | 1981-07-06 | 1981-07-10 |
| 1982 | 1982-07-25 | 1982-08-16 |
| 1983 | 1983-06-26 | 1983-09-03 |
| 1984 | 1984-08-29 | 1984-08-29 |
| 1985 | 1985-07-19 | 1985-07-19 |
| 1986 | 1986-05-29 | 1986-08-15 |
| 1987 | 1987-06-14 | 1987-08-03 |
| 1988 | 1988-06-05 | 1988-08-16 |
| 1989 | 1989-07-04 | 1989-08-07 |
| 1990 | 1990-07-04 | 1990-09-01 |
| 1991 | 1991-08-30 | 1991-08-30 |
| 1993 | 1993-07-28 | 1993-07-28 |
| 1995 | 1995-06-19 | 1995-06-20 |
| 1996 | 1996-06-29 | 1996-06-30 |
| 1999 | 1999-07-04 | 1999-07-30 |
| 2001 | 2001-08-06 | 2001-08-09 |
| 2002 | 2002-07-03 | 2002-08-12 |
| 2003 | 2003-08-22 | 2003-08-22 |
| 2005 | 2005-06-25 | 2005-08-03 |
| 2006 | 2006-07-16 | 2006-08-02 |
| 2007 | 2007-07-31 | 2007-09-06 |
| 2011 | 2011-06-09 | 2011-08-02 |
| 2012 | 2012-07-05 | 2012-07-24 |
| 2013 | 2013-07-18 | 2013-07-18 |
| 2015 | 2015-07-27 | 2015-08-15 |
| 2016 | 2016-07-23 | 2016-07-23 |
| 2018 | 2018-08-15 | 2018-08-15 |
| 2020 | 2020-07-03 | 2020-07-04 |
| 2021 | 2021-06-19 | 2021-07-04 |
| 2022 | 2022-07-22 | 2022-07-24 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 56 | 14 | 1955 | 3 |
| 35 C (95 F): Days | 1 | 2 | 1955 | 2 |
| 90 F (32.2 C): Days | 21 | 7 | 1955 | 1 |
| 0 C (32 F): Ice days (max | 78 | 103 | 2014 | 44 |
| 0 C (32 F): Frost days (min | 80 | 187 | 1976 | 58 |
| -10 C (14 F): Days with min | 80 | 83 | 2014 | 36 |
| -20 C (-4 F): Days with min | 70 | 34 | 2014 | 6 |
| -30 C (-22 F): Days with min | 7 | 2 | 1996 | 2 |
| 20 C (68 F): Tropical nights (min | 48 | 16 | 1955 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 76 | 37 | 2019 | 24 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 76 | 11 | 1960 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 27 | 3 | 1959 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 1 | 2013 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 71 | 12 | 2019 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 12 | 3 | 2018 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.
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).