{"icao":"RJSN","name":"Niigata Airport","lat":37.9542,"lon":139.1122,"country":"JP","tz":"Asia/Tokyo","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":27,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","February"],"monthlyHours":[11,6,1,3,2,0,0,0,1,1,1,3],"medianEventHours":1,"season":{"summary":"Fog season is January, February, April, December, peaking in January; fog is mostly a 11 PM\u201311 PM phenomenon; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","April","December"],"timeOfDay":"11 PM\u201311 PM","typicallyClearsBy":null}},"forecast":{"covered":false,"public":false,"wording":"No fog forecast feed exists for this station. September typically brings about 1 hour of dense fog here (10-year average)."},"links":{"page":"https://fogatlas.org/fog/rjsn/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=RJSN","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/RJSN.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}