{"icao":"CYKF","name":"Region of Waterloo International Airport","lat":43.4608,"lon":-80.3786,"country":"CA","tz":"America/Toronto","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":122,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["September","October"],"monthlyHours":[11,9,9,4,7,3,7,9,22,16,14,16],"medianEventHours":1,"season":{"summary":"Fog season is January, February, March, May, July, August, September, October, November, December, peaking in September; 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","May","July","August","September","October","November","December"],"timeOfDay":"1 AM\u20138 AM","typicallyClearsBy":"10 AM"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":5,"peakAtLocal":"2026-09-05T07:00:00-04:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 5%. September typically brings about 22 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/cykf/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=CYKF","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/CYKF.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}