{"title":"Washington, D.C.: Days at or above 100 F, days by year","description":"Days by year for Days at or above 100 F in Washington, D.C..","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/washington-dc/days-above-100f/","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_100f","year":1952,"days":1,"first":"1952-06-26","last":"1952-06-26","longest_streak":1},{"threshold":"tmax_ge_100f","year":1953,"days":2,"first":"1953-08-31","last":"1953-09-02","longest_streak":1},{"threshold":"tmax_ge_100f","year":1954,"days":4,"first":"1954-06-26","last":"1954-07-31","longest_streak":2},{"threshold":"tmax_ge_100f","year":1957,"days":2,"first":"1957-07-21","last":"1957-07-22","longest_streak":2},{"threshold":"tmax_ge_100f","year":1959,"days":2,"first":"1959-06-29","last":"1959-06-30","longest_streak":2},{"threshold":"tmax_ge_100f","year":1964,"days":1,"first":"1964-06-10","last":"1964-06-10","longest_streak":1},{"threshold":"tmax_ge_100f","year":1966,"days":1,"first":"1966-07-03","last":"1966-07-03","longest_streak":1},{"threshold":"tmax_ge_100f","year":1969,"days":1,"first":"1969-06-28","last":"1969-06-28","longest_streak":1},{"threshold":"tmax_ge_100f","year":1977,"days":1,"first":"1977-07-06","last":"1977-07-06","longest_streak":1},{"threshold":"tmax_ge_100f","year":1978,"days":1,"first":"1978-07-23","last":"1978-07-23","longest_streak":1},{"threshold":"tmax_ge_100f","year":1980,"days":6,"first":"1980-07-16","last":"1980-09-02","longest_streak":2},{"threshold":"tmax_ge_100f","year":1983,"days":1,"first":"1983-08-20","last":"1983-08-20","longest_streak":1},{"threshold":"tmax_ge_100f","year":1987,"days":3,"first":"1987-07-21","last":"1987-08-27","longest_streak":1},{"threshold":"tmax_ge_100f","year":1988,"days":7,"first":"1988-06-22","last":"1988-08-17","longest_streak":3},{"threshold":"tmax_ge_100f","year":1990,"days":1,"first":"1990-07-05","last":"1990-07-05","longest_streak":1},{"threshold":"tmax_ge_100f","year":1991,"days":2,"first":"1991-07-21","last":"1991-07-23","longest_streak":1},{"threshold":"tmax_ge_100f","year":1993,"days":4,"first":"1993-07-08","last":"1993-07-28","longest_streak":3},{"threshold":"tmax_ge_100f","year":1994,"days":1,"first":"1994-06-15","last":"1994-06-15","longest_streak":1},{"threshold":"tmax_ge_100f","year":1997,"days":5,"first":"1997-06-25","last":"1997-08-17","longest_streak":2},{"threshold":"tmax_ge_100f","year":1999,"days":3,"first":"1999-07-05","last":"1999-07-31","longest_streak":2},{"threshold":"tmax_ge_100f","year":2002,"days":2,"first":"2002-08-02","last":"2002-08-13","longest_streak":1},{"threshold":"tmax_ge_100f","year":2006,"days":1,"first":"2006-08-03","last":"2006-08-03","longest_streak":1},{"threshold":"tmax_ge_100f","year":2007,"days":1,"first":"2007-08-08","last":"2007-08-08","longest_streak":1},{"threshold":"tmax_ge_100f","year":2010,"days":4,"first":"2010-06-24","last":"2010-07-24","longest_streak":2},{"threshold":"tmax_ge_100f","year":2011,"days":5,"first":"2011-06-09","last":"2011-08-01","longest_streak":2},{"threshold":"tmax_ge_100f","year":2012,"days":8,"first":"2012-06-29","last":"2012-07-26","longest_streak":4},{"threshold":"tmax_ge_100f","year":2016,"days":4,"first":"2016-07-25","last":"2016-08-15","longest_streak":3},{"threshold":"tmax_ge_100f","year":2024,"days":6,"first":"2024-06-22","last":"2024-08-28","longest_streak":4},{"threshold":"tmax_ge_100f","year":2026,"days":4,"first":"2026-06-12","last":"2026-07-04","longest_streak":3}]}