{"icao":"KFSD","name":"Sioux Falls Regional Airport","lat":43.5855,"lon":-96.7412,"country":"US","tz":"America/Chicago","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":49,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["December","January"],"monthlyHours":[10,6,6,3,1,0,0,1,2,1,4,15],"medianEventHours":2,"season":{"summary":"Fog season runs November through March, peaking in December; fog is mostly a 9 PM\u201310 AM phenomenon; typically thinning out by 11 AM; a typical event lasts about 2 hours (local time, 10-year average).","months":["January","February","March","November","December"],"timeOfDay":"9 PM\u201310 AM","typicallyClearsBy":"11 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 2 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/kfsd/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KFSD","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KFSD.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}