{"city":"Philadelphia","region":"US-PA","country":"US","slug":"philadelphia-pa","updated":"2026-08-16T02:45Z","window":{"start":"2016-01-01","through":"2026-08-15"},"stations":[{"icao":"KPHL","name":"Philadelphia International Airport","subCat1HoursPerYear":21,"forecast":"verifying"},{"icao":"KPNE","name":"Northeast Philadelphia Airport","subCat1HoursPerYear":38,"forecast":"verifying"}],"primaryStation":"KPHL","forecast":{"covered":true,"public":false,"cycle":"2026-08-16T00:00:00Z","guidanceSignal":false,"wording":"No fog signal in NWS guidance for the next 48 hours. dense fog (visibility under a mile) is rare here in August."},"climatology":{"subCat1HoursPerYear":21,"fogSeasonPeakMonths":["January","February"],"medianEventHours":1,"season":{"summary":"Fog season is January, February, March, October, December, peaking in January; fog is mostly a 1 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","March","October","December"],"timeOfDay":"1 AM\u20138 AM","typicallyClearsBy":"10 AM"}},"links":{"page":"https://fogatlas.org/fog/city/philadelphia-pa/","stationPages":["https://fogatlas.org/fog/kphl/","https://fogatlas.org/fog/kpne/"],"verification":"https://fogatlas.org/fog/scorecard/"}}