{"icao":"KGUS","name":"Grissom Air Reserve Base","lat":40.6481,"lon":-86.1521,"country":"US","tz":"America/Indiana/Indianapolis","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":45,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","December"],"monthlyHours":[9,4,2,1,1,1,4,4,4,3,3,8],"medianEventHours":1,"season":{"summary":"Fog season runs July through February, peaking in January; fog is mostly a 6 AM\u20138 AM phenomenon; typically thinning out by 10 AM; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","July","August","September","October","November","December"],"timeOfDay":"6 AM\u20138 AM","typicallyClearsBy":"10 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 4 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/kgus/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KGUS","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KGUS.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}