Fog in Sept-Îles, QC

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 3%). August typically brings about 10 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Sept-Îles Airport (CYZV). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYZVSept-Îles Airport87 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 Sept-Îles fogs in

Fog here concentrates in July and September — about 87 hours in a typical year at CYZV, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYZV station page.

Fog season

January: ~4 hJanFebruary: ~2 hFebMarch: ~5 hMarApril: ~7 hAprMay: ~4 hMayJune: ~9 hJunJuly: ~19 hJulAugust: ~10 hAugSeptember: ~12 hSepOctober: ~6 hOctNovember: ~3 hNovDecember: ~5 hDec
Fog season is March, April, June, July, August, September, October, December, peaking in July; fog is mostly a 10 PM–9 AM phenomenon; typically thinning out by 11 AM; 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.