{"icao":"KROC","name":"Frederick Douglass Greater Rochester International Airport","lat":43.1189,"lon":-77.6724,"country":"US","tz":"America/New_York","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":26,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","March"],"monthlyHours":[5,3,4,2,1,1,1,0,3,1,2,4],"medianEventHours":1,"season":{"summary":"Fog season is January, February, March, April, September, November, December, peaking in January; fog is mostly a 3 AM\u20139 AM phenomenon; typically thinning out by 3 PM; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","March","April","September","November","December"],"timeOfDay":"3 AM\u20139 AM","typicallyClearsBy":"3 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 3 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/kroc/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KROC","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KROC.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}