{"city":"Sein\u00e4joki / Ilmajoki","region":"FI-03","country":"FI","slug":"seinajoki-ilmajoki","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"EFSI","name":"Sein\u00e4joki Airport","subCat1HoursPerYear":250,"forecast":"climatology"}],"primaryStation":"EFSI","forecast":{"covered":false,"public":false,"wording":"No fog forecast feed exists for this station. August typically brings about 31 hours of dense fog here (10-year average)."},"climatology":{"subCat1HoursPerYear":250,"fogSeasonPeakMonths":["September","October"],"medianEventHours":1,"season":{"summary":"Fog season is year-round, peaking in September; fog is mostly a 11 PM\u20138 AM phenomenon; typically thinning out by 11 AM; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","March","April","May","June","July","August","September","October","November","December"],"timeOfDay":"11 PM\u20138 AM","typicallyClearsBy":"11 AM"}},"links":{"page":"https://fogatlas.org/fog/city/seinajoki-ilmajoki/","stationPages":["https://fogatlas.org/fog/efsi/"],"verification":"https://fogatlas.org/fog/scorecard/"}}