{"city":"Madison","region":"US-WI","country":"US","slug":"madison-wi","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"KMSN","name":"Dane County Regional Truax Field","subCat1HoursPerYear":32,"forecast":"verifying"}],"primaryStation":"KMSN","forecast":{"covered":true,"public":false,"cycle":"2026-08-16T00:00:00Z","guidanceSignal":true,"wording":"NWS guidance shows a fog signal here in the next 48 hours. This station's calibrated percentages publish after live verification clears the accuracy bar. August typically brings about 4 hours of dense fog here."},"climatology":{"subCat1HoursPerYear":32,"fogSeasonPeakMonths":["December","January"],"medianEventHours":2,"season":{"summary":"Fog season is January, February, March, April, August, September, November, December, peaking in December; fog is mostly a midnight\u20138 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","November","December"],"timeOfDay":"midnight\u20138 AM","typicallyClearsBy":"10 AM"}},"links":{"page":"https://fogatlas.org/fog/city/madison-wi/","stationPages":["https://fogatlas.org/fog/kmsn/"],"verification":"https://fogatlas.org/fog/scorecard/"}}