{"icao":"KJST","name":"John Murtha Johnstown Cambria County Airport","lat":40.3161,"lon":-78.8339,"country":"US","tz":"America/New_York","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":121,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["January","December"],"monthlyHours":[16,13,13,6,9,6,5,7,8,11,11,16],"medianEventHours":1,"season":{"summary":"Fog season is year-round, peaking in January; fog is mostly a 2 AM\u20139 AM phenomenon; typically thinning out by 3 PM; a typical event lasts about 1 hour (local time, 10-year average).","months":["January","February","March","April","May","June","July","August","September","October","November","December"],"timeOfDay":"2 AM\u20139 AM","typicallyClearsBy":"3 PM"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":7,"peakAtLocal":"2026-09-05T08:00:00-04:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 7%. September typically brings about 8 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/kjst/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=KJST","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/KJST.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}