{"icao":"CYSP","name":"Marathon Airport","lat":48.7553,"lon":-86.3444,"country":"CA","tz":"America/Toronto","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":329,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["July","May"],"monthlyHours":[5,7,4,9,19,18,27,15,14,4,6,5],"medianEventHours":2,"season":{"summary":"Fog season is February, April, May, June, July, August, September, peaking in July; fog is mostly a 8 AM\u201311 AM phenomenon; typically thinning out by 6 PM; a typical event lasts about 2 hours (local time, 10-year average).","months":["February","April","May","June","July","August","September"],"timeOfDay":"8 AM\u201311 AM","typicallyClearsBy":"6 PM"}},"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 14 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/cysp/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=CYSP","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/CYSP.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}