{"icao":"EFOU","name":"Oulu Airport","lat":64.9301,"lon":25.3546,"country":"FI","tz":"Europe/Helsinki","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":97,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["November","October"],"monthlyHours":[13,11,7,4,4,1,2,3,13,14,18,8],"medianEventHours":1,"season":{"summary":"Fog season runs September through March, peaking in November; fog here can hit at any hour of the day; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","March","September","October","November","December"],"timeOfDay":"any hour of the day","typicallyClearsBy":null}},"forecast":{"covered":false,"public":false,"wording":"No fog forecast feed exists for this station. September typically brings about 13 hours of dense fog here (10-year average)."},"links":{"page":"https://fogatlas.org/fog/efou/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=EFOU","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/EFOU.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}