Fog in High Level, AB

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 3%). August typically brings about 7 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at High Level Airport (CYOJ). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYOJHigh Level Airport65 h/yrlive forecast

Fog is measured where instruments live — airports. Hours/yr = time below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), the aviation definition of seriously dense fog.

When High Level fogs in

Fog here concentrates in September and November — about 65 hours in a typical year at CYOJ, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYOJ station page.

Fog season

January: ~5 hJanFebruary: ~1 hFebMarch: ~1 hMarApril: ~2 hAprMay: ~1 hMayJune: ~4 hJunJuly: ~3 hJulAugust: ~7 hAugSeptember: ~14 hSepOctober: ~10 hOctNovember: ~12 hNovDecember: ~7 hDec
Fog season is January, June, August, September, October, November, December, peaking in September; fog is mostly a 2 AM–10 AM phenomenon; typically thinning out by noon; a typical event lasts about 1 hour once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.