{"icao":"CYMT","name":"Chapais Airport","lat":49.7719,"lon":-74.5281,"country":"CA","tz":"America/Toronto","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":50,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["September","November"],"monthlyHours":[2,3,3,3,3,5,4,5,8,6,6,2],"medianEventHours":1,"season":{"summary":"Fog season is year-round, peaking in September; fog is mostly a 4 AM\u20139 AM phenomenon; typically thinning out by noon; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","March","April","May","June","July","August","September","October","November","December"],"timeOfDay":"4 AM\u20139 AM","typicallyClearsBy":"noon"}},"forecast":{"covered":true,"public":false,"cycle":"2026-09-04T13:00:00Z","guidanceSignal":false,"wording":"No fog signal in NWS guidance for the next 48 hours. September typically brings about 8 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/cymt/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=CYMT","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/CYMT.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}