{"icao":"ESSA","name":"Stockholm-Arlanda Airport","lat":59.6485,"lon":17.9288,"country":"SE","tz":"Europe/Stockholm","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":134,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","November"],"monthlyHours":[22,13,13,6,3,2,3,8,17,12,20,16],"medianEventHours":2,"season":{"summary":"Fog season runs August through April, peaking in January; fog is mostly a 10 PM\u20137 AM phenomenon; typically thinning out by 10 AM; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","March","April","August","September","October","November","December"],"timeOfDay":"10 PM\u20137 AM","typicallyClearsBy":"10 AM"}},"forecast":{"covered":false,"public":false,"wording":"No fog forecast feed exists for this station. September typically brings about 17 hours of dense fog here (10-year average)."},"links":{"page":"https://fogatlas.org/fog/essa/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=ESSA","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/ESSA.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}