Fog in Havre-Saint-Pierre, QC

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 4%). August typically brings about 27 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Havre-Saint-Pierre Airport (CYGV). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYGVHavre-Saint-Pierre Airport132 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 Havre-Saint-Pierre fogs in

Fog here concentrates in July and August — about 132 hours in a typical year at CYGV, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYGV station page.

Fog season

January: ~5 hJanFebruary: ~5 hFebMarch: ~4 hMarApril: ~10 hAprMay: ~8 hMayJune: ~10 hJunJuly: ~29 hJulAugust: ~27 hAugSeptember: ~15 hSepOctober: ~7 hOctNovember: ~5 hNovDecember: ~4 hDec
Fog season runs April through September, peaking in July; fog is mostly a 2 AM–7 AM phenomenon; typically thinning out by 9 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.