{"title":"Seattle: Days at or above 30 C, days by year","description":"Days by year for Days at or above 30 C in Seattle.","dataAsOf":"2026-10-17T00:00:00Z","lastRevised":"2026-10-18","source":"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.","licence":"US Government open data (NOAA NCEI)","page":"https://worldextremeweathermonitor.com/cities/seattle/days-above-30c/","columns":[{"name":"threshold","description":"Threshold id, for example tmax_ge_40c."},{"name":"year","description":"Calendar year."},{"name":"days","description":"Days in the year at or beyond the threshold."},{"name":"first","description":"First qualifying date of the year."},{"name":"last","description":"Last qualifying date of the year."},{"name":"longest_streak","description":"Longest run of consecutive qualifying days inside the year."}],"rows":[{"threshold":"tmax_ge_30c","year":1948,"days":3,"first":"1948-06-07","last":"1948-07-31","longest_streak":2},{"threshold":"tmax_ge_30c","year":1949,"days":4,"first":"1949-07-13","last":"1949-09-06","longest_streak":2},{"threshold":"tmax_ge_30c","year":1950,"days":3,"first":"1950-07-21","last":"1950-09-21","longest_streak":1},{"threshold":"tmax_ge_30c","year":1951,"days":7,"first":"1951-06-28","last":"1951-09-15","longest_streak":3},{"threshold":"tmax_ge_30c","year":1952,"days":9,"first":"1952-07-08","last":"1952-09-21","longest_streak":3},{"threshold":"tmax_ge_30c","year":1953,"days":3,"first":"1953-05-05","last":"1953-09-05","longest_streak":1},{"threshold":"tmax_ge_30c","year":1955,"days":3,"first":"1955-06-09","last":"1955-09-05","longest_streak":1},{"threshold":"tmax_ge_30c","year":1956,"days":7,"first":"1956-05-30","last":"1956-09-06","longest_streak":2},{"threshold":"tmax_ge_30c","year":1958,"days":16,"first":"1958-05-18","last":"1958-09-07","longest_streak":3},{"threshold":"tmax_ge_30c","year":1959,"days":9,"first":"1959-07-09","last":"1959-07-31","longest_streak":6},{"threshold":"tmax_ge_30c","year":1960,"days":12,"first":"1960-07-05","last":"1960-08-09","longest_streak":4},{"threshold":"tmax_ge_30c","year":1961,"days":14,"first":"1961-06-15","last":"1961-09-13","longest_streak":4},{"threshold":"tmax_ge_30c","year":1962,"days":4,"first":"1962-07-23","last":"1962-07-28","longest_streak":3},{"threshold":"tmax_ge_30c","year":1963,"days":7,"first":"1963-05-18","last":"1963-09-09","longest_streak":4},{"threshold":"tmax_ge_30c","year":1964,"days":1,"first":"1964-05-31","last":"1964-05-31","longest_streak":1},{"threshold":"tmax_ge_30c","year":1965,"days":10,"first":"1965-06-30","last":"1965-08-18","longest_streak":4},{"threshold":"tmax_ge_30c","year":1966,"days":3,"first":"1966-06-15","last":"1966-08-21","longest_streak":2},{"threshold":"tmax_ge_30c","year":1967,"days":20,"first":"1967-06-19","last":"1967-09-27","longest_streak":8},{"threshold":"tmax_ge_30c","year":1968,"days":9,"first":"1968-06-25","last":"1968-08-10","longest_streak":3},{"threshold":"tmax_ge_30c","year":1969,"days":4,"first":"1969-05-22","last":"1969-06-17","longest_streak":2},{"threshold":"tmax_ge_30c","year":1970,"days":5,"first":"1970-06-01","last":"1970-07-15","longest_streak":2},{"threshold":"tmax_ge_30c","year":1971,"days":12,"first":"1971-05-11","last":"1971-08-11","longest_streak":4},{"threshold":"tmax_ge_30c","year":1972,"days":9,"first":"1972-05-27","last":"1972-08-08","longest_streak":4},{"threshold":"tmax_ge_30c","year":1973,"days":6,"first":"1973-05-14","last":"1973-09-05","longest_streak":2},{"threshold":"tmax_ge_30c","year":1974,"days":15,"first":"1974-06-29","last":"1974-09-24","longest_streak":6},{"threshold":"tmax_ge_30c","year":1975,"days":9,"first":"1975-06-01","last":"1975-09-22","longest_streak":2},{"threshold":"tmax_ge_30c","year":1976,"days":3,"first":"1976-06-18","last":"1976-09-20","longest_streak":1},{"threshold":"tmax_ge_30c","year":1977,"days":15,"first":"1977-06-17","last":"1977-08-17","longest_streak":5},{"threshold":"tmax_ge_30c","year":1978,"days":11,"first":"1978-06-02","last":"1978-08-08","longest_streak":4},{"threshold":"tmax_ge_30c","year":1979,"days":8,"first":"1979-06-02","last":"1979-09-14","longest_streak":5},{"threshold":"tmax_ge_30c","year":1980,"days":1,"first":"1980-08-10","last":"1980-08-10","longest_streak":1},{"threshold":"tmax_ge_30c","year":1981,"days":12,"first":"1981-07-26","last":"1981-09-15","longest_streak":7},{"threshold":"tmax_ge_30c","year":1982,"days":8,"first":"1982-06-18","last":"1982-09-02","longest_streak":2},{"threshold":"tmax_ge_30c","year":1983,"days":1,"first":"1983-05-28","last":"1983-05-28","longest_streak":1},{"threshold":"tmax_ge_30c","year":1984,"days":4,"first":"1984-07-16","last":"1984-09-14","longest_streak":2},{"threshold":"tmax_ge_30c","year":1985,"days":14,"first":"1985-06-18","last":"1985-08-23","longest_streak":3},{"threshold":"tmax_ge_30c","year":1986,"days":10,"first":"1986-05-31","last":"1986-09-06","longest_streak":3},{"threshold":"tmax_ge_30c","year":1987,"days":10,"first":"1987-06-26","last":"1987-10-01","longest_streak":3},{"threshold":"tmax_ge_30c","year":1988,"days":12,"first":"1988-06-14","last":"1988-09-03","longest_streak":3},{"threshold":"tmax_ge_30c","year":1989,"days":3,"first":"1989-06-04","last":"1989-09-22","longest_streak":1},{"threshold":"tmax_ge_30c","year":1990,"days":14,"first":"1990-07-11","last":"1990-09-22","longest_streak":4},{"threshold":"tmax_ge_30c","year":1991,"days":6,"first":"1991-07-02","last":"1991-08-21","longest_streak":2},{"threshold":"tmax_ge_30c","year":1992,"days":14,"first":"1992-05-24","last":"1992-08-17","longest_streak":5},{"threshold":"tmax_ge_30c","year":1993,"days":3,"first":"1993-08-03","last":"1993-08-05","longest_streak":3},{"threshold":"tmax_ge_30c","year":1994,"days":7,"first":"1994-07-19","last":"1994-09-22","longest_streak":5},{"threshold":"tmax_ge_30c","year":1995,"days":7,"first":"1995-06-28","last":"1995-07-19","longest_streak":4},{"threshold":"tmax_ge_30c","year":1996,"days":14,"first":"1996-07-12","last":"1996-08-29","longest_streak":5},{"threshold":"tmax_ge_30c","year":1997,"days":5,"first":"1997-07-04","last":"1997-08-17","longest_streak":3},{"threshold":"tmax_ge_30c","year":1998,"days":9,"first":"1998-07-16","last":"1998-09-01","longest_streak":4},{"threshold":"tmax_ge_30c","year":1999,"days":2,"first":"1999-07-09","last":"1999-09-13","longest_streak":1},{"threshold":"tmax_ge_30c","year":2000,"days":2,"first":"2000-06-27","last":"2000-06-28","longest_streak":2},{"threshold":"tmax_ge_30c","year":2001,"days":3,"first":"2001-08-09","last":"2001-08-12","longest_streak":2},{"threshold":"tmax_ge_30c","year":2002,"days":6,"first":"2002-06-13","last":"2002-08-28","longest_streak":2},{"threshold":"tmax_ge_30c","year":2003,"days":12,"first":"2003-06-05","last":"2003-09-04","longest_streak":3},{"threshold":"tmax_ge_30c","year":2004,"days":8,"first":"2004-06-18","last":"2004-08-09","longest_streak":4},{"threshold":"tmax_ge_30c","year":2005,"days":10,"first":"2005-05-26","last":"2005-08-15","longest_streak":3},{"threshold":"tmax_ge_30c","year":2006,"days":14,"first":"2006-06-25","last":"2006-09-02","longest_streak":4},{"threshold":"tmax_ge_30c","year":2007,"days":5,"first":"2007-05-30","last":"2007-08-29","longest_streak":2},{"threshold":"tmax_ge_30c","year":2008,"days":9,"first":"2008-05-17","last":"2008-08-16","longest_streak":3},{"threshold":"tmax_ge_30c","year":2009,"days":20,"first":"2009-06-02","last":"2009-09-22","longest_streak":6},{"threshold":"tmax_ge_30c","year":2010,"days":10,"first":"2010-07-07","last":"2010-08-25","longest_streak":5},{"threshold":"tmax_ge_30c","year":2011,"days":1,"first":"2011-08-21","last":"2011-08-21","longest_streak":1},{"threshold":"tmax_ge_30c","year":2012,"days":8,"first":"2012-08-04","last":"2012-09-07","longest_streak":3},{"threshold":"tmax_ge_30c","year":2013,"days":15,"first":"2013-05-06","last":"2013-09-11","longest_streak":4},{"threshold":"tmax_ge_30c","year":2014,"days":17,"first":"2014-07-01","last":"2014-09-15","longest_streak":2},{"threshold":"tmax_ge_30c","year":2015,"days":23,"first":"2015-06-07","last":"2015-08-19","longest_streak":6},{"threshold":"tmax_ge_30c","year":2016,"days":14,"first":"2016-04-18","last":"2016-08-26","longest_streak":3},{"threshold":"tmax_ge_30c","year":2017,"days":20,"first":"2017-05-27","last":"2017-09-28","longest_streak":4},{"threshold":"tmax_ge_30c","year":2018,"days":24,"first":"2018-05-14","last":"2018-08-22","longest_streak":6},{"threshold":"tmax_ge_30c","year":2019,"days":8,"first":"2019-05-10","last":"2019-08-28","longest_streak":2},{"threshold":"tmax_ge_30c","year":2020,"days":12,"first":"2020-05-09","last":"2020-09-10","longest_streak":3},{"threshold":"tmax_ge_30c","year":2021,"days":14,"first":"2021-06-01","last":"2021-08-13","longest_streak":4},{"threshold":"tmax_ge_30c","year":2022,"days":20,"first":"2022-06-25","last":"2022-10-16","longest_streak":7},{"threshold":"tmax_ge_30c","year":2023,"days":17,"first":"2023-05-13","last":"2023-09-02","longest_streak":5},{"threshold":"tmax_ge_30c","year":2024,"days":15,"first":"2024-06-21","last":"2024-09-06","longest_streak":6},{"threshold":"tmax_ge_30c","year":2025,"days":17,"first":"2025-06-08","last":"2025-09-16","longest_streak":5},{"threshold":"tmax_ge_30c","year":2026,"days":12,"first":"2026-06-02","last":"2026-08-20","longest_streak":3}]}