{"icao":"KATW","name":"Appleton International Airport","lat":44.2585,"lon":-88.519,"country":"US","tz":"America/Chicago","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":54,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["December","February"],"monthlyHours":[10,12,5,6,4,1,0,2,3,1,1,14],"medianEventHours":2,"season":{"summary":"Fog season runs December through May, peaking in December; fog is mostly a 11 PM\u201310 AM phenomenon; typically thinning out by 1 PM; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","March","April","May","December"],"timeOfDay":"11 PM\u201310 AM","typicallyClearsBy":"1 PM"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":15,"peakAtLocal":"2026-09-05T04:00:00-05:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 15%. September typically brings about 3 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/katw/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KATW","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KATW.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}