{"icao":"CYOW","name":"Ottawa Macdonald-Cartier International Airport","lat":45.3225,"lon":-75.6692,"country":"CA","tz":"America/Toronto","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":46,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["November","December"],"monthlyHours":[4,4,4,3,2,2,1,2,3,5,9,6],"medianEventHours":2,"season":{"summary":"Fog season runs September through April, peaking in November; fog is mostly a 3 AM\u20139 AM phenomenon; typically thinning out by 5 PM; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","March","April","September","October","November","December"],"timeOfDay":"3 AM\u20139 AM","typicallyClearsBy":"5 PM"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":3,"peakAtLocal":"2026-09-05T04:00:00-04:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 3%. September typically brings about 3 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/cyow/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=CYOW","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/CYOW.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}