{"city":"Ottawa","region":"CA-ON","country":"CA","slug":"ottawa-on","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"CYOW","name":"Ottawa Macdonald-Cartier International Airport","subCat1HoursPerYear":46,"forecast":"live forecast"}],"primaryStation":"CYOW","forecast":{"covered":true,"public":true,"cycle":"2026-08-16T00:00:00Z","peakPct":12,"peakAtLocal":"2026-08-17T08:00:00-04:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 12%. August typically brings about 2 hours of dense fog here."},"climatology":{"subCat1HoursPerYear":46,"fogSeasonPeakMonths":["November","December"],"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"}},"links":{"page":"https://fogatlas.org/fog/city/ottawa-on/","stationPages":["https://fogatlas.org/fog/cyow/"],"verification":"https://fogatlas.org/fog/scorecard/"}}