{"city":"Mason City","region":"US-IA","country":"US","slug":"mason-city-ia","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"KMCW","name":"Mason City Municipal Airport","subCat1HoursPerYear":86,"forecast":"live forecast"}],"primaryStation":"KMCW","forecast":{"covered":true,"public":true,"cycle":"2026-08-16T00:00:00Z","peakPct":10,"peakAtLocal":"2026-08-17T04:00:00-05:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 10%. August typically brings about 12 hours of dense fog here."},"climatology":{"subCat1HoursPerYear":86,"fogSeasonPeakMonths":["December","August"],"medianEventHours":2,"season":{"summary":"Fog season is January, February, March, August, September, November, December, peaking in December; fog is mostly a 1 AM\u20138 AM phenomenon; typically thinning out by noon; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","March","August","September","November","December"],"timeOfDay":"1 AM\u20138 AM","typicallyClearsBy":"noon"}},"links":{"page":"https://fogatlas.org/fog/city/mason-city-ia/","stationPages":["https://fogatlas.org/fog/kmcw/"],"verification":"https://fogatlas.org/fog/scorecard/"}}