Fog in Sherbrooke, QC

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 7 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Sherbrooke Airport (CYSC). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYSCSherbrooke Airport46 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 Sherbrooke fogs in

Fog here concentrates in September and August — about 46 hours in a typical year at CYSC, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYSC station page.

Fog season

January: ~3 hJanFebruary: ~2 hFebMarch: ~4 hMarApril: ~2 hAprMay: ~0 hMayJune: ~5 hJunJuly: ~3 hJulAugust: ~7 hAugSeptember: ~10 hSepOctober: ~3 hOctNovember: ~4 hNovDecember: ~3 hDec
Fog season is January, March, June, July, August, September, October, November, December, peaking in September; 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.