Fog in Quebec, QC

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 1 hour of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Quebec Jean Lesage International Airport (CYQB). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYQBQuebec Jean Lesage International Airport44 h/yrverifying

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 Quebec fogs in

Fog here concentrates in December and March — about 44 hours in a typical year at CYQB, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYQB station page.

Fog season

January: ~5 hJanFebruary: ~4 hFebMarch: ~7 hMarApril: ~6 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~2 hJulAugust: ~1 hAugSeptember: ~3 hSepOctober: ~4 hOctNovember: ~3 hNovDecember: ~7 hDec
Fog season is January, February, March, April, July, September, October, November, December, peaking in March; fog is mostly a 5 AM–9 AM phenomenon; typically thinning out by 2 PM; 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.