Fog in Fredericton, NB

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 Fredericton International Airport (CYFC). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYFCFredericton International Airport67 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 Fredericton fogs in

Fog here concentrates in October and September — about 67 hours in a typical year at CYFC, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYFC station page.

Fog season

January: ~4 hJanFebruary: ~6 hFebMarch: ~7 hMarApril: ~4 hAprMay: ~1 hMayJune: ~4 hJunJuly: ~3 hJulAugust: ~7 hAugSeptember: ~11 hSepOctober: ~12 hOctNovember: ~2 hNovDecember: ~6 hDec
Fog season is January, February, March, April, June, July, August, September, October, December, peaking in October; fog is mostly a 6 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.