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October Weather in Washington
Washington's October 2026 forecast shows daily high temperatures ranging from 68° to 78°, with overnight lows between 47° and 49°. The average high for October is 72° with an average low of 48°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Washington. See also: November | December | January.