{"city":"Chicago/West Chicago","region":"US-IL","country":"US","slug":"chicago-west-chicago-il","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"KDPA","name":"Dupage Airport","subCat1HoursPerYear":41,"forecast":"verifying"}],"primaryStation":"KDPA","forecast":{"covered":true,"public":false,"cycle":"2026-08-16T00:00:00Z","guidanceSignal":false,"wording":"No fog signal in NWS guidance for the next 48 hours. August typically brings about 1 hour of dense fog here."},"climatology":{"subCat1HoursPerYear":41,"fogSeasonPeakMonths":["January","February"],"medianEventHours":1,"season":{"summary":"Fog season runs November through February, peaking in January; fog is mostly a 1 AM\u20138 AM phenomenon; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","November","December"],"timeOfDay":"1 AM\u20138 AM","typicallyClearsBy":null}},"links":{"page":"https://fogatlas.org/fog/city/chicago-west-chicago-il/","stationPages":["https://fogatlas.org/fog/kdpa/"],"verification":"https://fogatlas.org/fog/scorecard/"}}