{"icao":"RJSY","name":"Shonai Airport","lat":38.8122,"lon":139.787,"country":"JP","tz":"Asia/Tokyo","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":35,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","December"],"monthlyHours":[9,4,1,0,1,0,0,0,0,0,0,5],"medianEventHours":1,"season":{"summary":"Fog season runs December through February, peaking in January; fog is mostly a 7 AM\u20138 PM phenomenon; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","December"],"timeOfDay":"7 AM\u20138 PM","typicallyClearsBy":null}},"forecast":{"covered":false,"public":false,"wording":"No fog forecast feed exists for this station. dense fog (visibility under a mile) is rare here in September (10-year average)."},"links":{"page":"https://fogatlas.org/fog/rjsy/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=RJSY","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/RJSY.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}