{"icao":"KMCW","name":"Mason City Municipal Airport","lat":43.1598,"lon":-93.3297,"country":"US","tz":"America/Chicago","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":86,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["December","August"],"monthlyHours":[12,9,8,3,4,3,4,12,6,3,5,18],"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"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":16,"peakAtLocal":"2026-09-05T07:00:00-05:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 16%. September typically brings about 6 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/kmcw/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KMCW","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KMCW.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}