{"city":"Springfield","region":"US-IL","country":"US","slug":"springfield-il","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"KSPI","name":"Abraham Lincoln Capital Airport","subCat1HoursPerYear":33,"forecast":"verifying"}],"primaryStation":"KSPI","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 2 hours of dense fog here."},"climatology":{"subCat1HoursPerYear":33,"fogSeasonPeakMonths":["January","February"],"medianEventHours":1,"season":{"summary":"Fog season is January, February, March, April, July, August, September, December, peaking in January; fog is mostly a 4 AM\u20138 AM phenomenon; typically thinning out by 10 AM; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","March","April","July","August","September","December"],"timeOfDay":"4 AM\u20138 AM","typicallyClearsBy":"10 AM"}},"links":{"page":"https://fogatlas.org/fog/city/springfield-il/","stationPages":["https://fogatlas.org/fog/kspi/"],"verification":"https://fogatlas.org/fog/scorecard/"}}