{"icao":"KSUS","name":"Spirit of St Louis Airport","lat":38.6621,"lon":-90.652,"country":"US","tz":"America/Chicago","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":["September","January"],"monthlyHours":[5,2,1,1,2,1,2,2,6,4,4,5],"medianEventHours":1,"season":{"summary":"Fog season is January, February, May, July, August, September, October, November, December, peaking in September; fog is mostly a 3 AM\u20137 AM phenomenon; typically thinning out by 9 AM; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","May","July","August","September","October","November","December"],"timeOfDay":"3 AM\u20137 AM","typicallyClearsBy":"9 AM"}},"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 6 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/ksus/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KSUS","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KSUS.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}