{"icao":"KSEA","name":"Seattle\u2013Tacoma International Airport","lat":47.4479,"lon":-122.3103,"country":"US","tz":"America/Los_Angeles","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":85,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","December"],"monthlyHours":[21,5,2,1,3,1,1,2,2,14,15,20],"medianEventHours":2,"season":{"summary":"Fog season runs October through January, peaking in January; fog is mostly a 2 AM\u20139 AM phenomenon; typically thinning out by 11 AM; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","October","November","December"],"timeOfDay":"2 AM\u20139 AM","typicallyClearsBy":"11 AM"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":4,"peakAtLocal":"2026-09-04T07:00:00-07:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 4%. September typically brings about 2 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/ksea/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KSEA","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KSEA.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}