Fog in Kapuskasing, ON

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. 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 Kapuskasing Airport (CYYU). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYYUKapuskasing Airport52 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 Kapuskasing fogs in

Fog here concentrates in September and October — about 52 hours in a typical year at CYYU, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYYU station page.

Fog season

January: ~4 hJanFebruary: ~4 hFebMarch: ~3 hMarApril: ~3 hAprMay: ~3 hMayJune: ~3 hJunJuly: ~3 hJulAugust: ~3 hAugSeptember: ~9 hSepOctober: ~7 hOctNovember: ~4 hNovDecember: ~6 hDec
Fog season is year-round, peaking in September; fog is mostly a 3 AM–10 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.