Fog in North Bay, ON

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 5 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at North Bay Jack Garland Airport (CYYB). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYYBNorth Bay Jack Garland Airport144 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 North Bay fogs in

Fog here concentrates in December and November — about 144 hours in a typical year at CYYB, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYYB station page.

Fog season

January: ~16 hJanFebruary: ~14 hFebMarch: ~13 hMarApril: ~15 hAprMay: ~11 hMayJune: ~6 hJunJuly: ~3 hJulAugust: ~5 hAugSeptember: ~10 hSepOctober: ~13 hOctNovember: ~16 hNovDecember: ~22 hDec
Fog season runs September through June, peaking in December; fog is mostly a 5 AM–10 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.