{"icao":"CYAH","name":"La Grande-4 Airport","lat":53.7547,"lon":-73.6753,"country":"CA","tz":"America/Toronto","updated":"2026-09-04T14:25Z","window":{"start":"2016-01-01","through":"2026-08-15"},"climatology":{"subCat1HoursPerYear":34,"bandDefinition":"visibility < ~800 m OR ceiling < 200 ft","fogSeasonPeakMonths":["July","September"],"monthlyHours":[1,2,2,1,2,4,7,4,4,3,1,3],"medianEventHours":1,"season":{"summary":"Fog season is February, March, May, June, July, August, September, October, December, peaking in July; fog is mostly a 4 AM\u20137 AM phenomenon; typically thinning out by 10 AM; a typical event lasts about 1 hour (local time, 10-year average).","months":["February","March","May","June","July","August","September","October","December"],"timeOfDay":"4 AM\u20137 AM","typicallyClearsBy":"10 AM"}},"forecast":{"covered":true,"public":true,"cycle":"2026-09-04T13:00:00Z","peakPct":3,"peakAtLocal":"2026-09-05T05:00:00-04:00","wording":"No, fog is unlikely in the next 36 hours \u2014 the calibrated forecast peaks at just 3%. September typically brings about 4 hours of dense fog here."},"links":{"page":"https://fogatlas.org/fog/cyah/","liveForecastApi":"https://fogatlas.org/api/forecast","liveObservationsApi":"https://fogatlas.org/api/metar?ids=CYAH","hourlyClimatologyDetail":"https://fogatlas.org/data/detail/CYAH.json","verification":"https://fogatlas.org/fog/scorecard/","methodology":"https://fogatlas.org/#methodology"}}