Fog in Sault Ste Marie, ON

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 8 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Sault Ste Marie Airport (CYAM). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYAMSault Ste Marie Airport95 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 Sault Ste Marie fogs in

Fog here concentrates in December and June — about 95 hours in a typical year at CYAM, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYAM station page.

Fog season

January: ~7 hJanFebruary: ~9 hFebMarch: ~7 hMarApril: ~7 hAprMay: ~7 hMayJune: ~10 hJunJuly: ~8 hJulAugust: ~8 hAugSeptember: ~8 hSepOctober: ~7 hOctNovember: ~4 hNovDecember: ~12 hDec
Fog season is year-round, peaking in December; fog is mostly a 3 AM–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.