Fog in Rouyn-Noranda, QC

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 8%). August typically brings about 3 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Rouyn Noranda Airport (CYUY). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYUYRouyn Noranda Airport26 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 Rouyn-Noranda fogs in

Fog here concentrates in October and November — about 26 hours in a typical year at CYUY, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYUY station page.

Fog season

January: ~1 hJanFebruary: ~1 hFebMarch: ~2 hMarApril: ~2 hAprMay: ~2 hMayJune: ~1 hJunJuly: ~3 hJulAugust: ~3 hAugSeptember: ~3 hSepOctober: ~4 hOctNovember: ~4 hNovDecember: ~2 hDec
Fog season is March, April, May, July, August, September, October, November, December, peaking in October; fog is mostly a 4 AM–8 AM phenomenon; typically thinning out by 10 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.