Fog in Trémuson, Côtes-d'Armor

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 5 hours of dense fog here (10-year average).

Measured at Saint-Brieuc-Armor Airport (LFRT). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
LFRTSaint-Brieuc-Armor Airport101 h/yrclimatology

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 Trémuson, Côtes-d'Armor fogs in

Fog here concentrates in November and December — about 101 hours in a typical year at LFRT, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the LFRT station page.

Fog season

January: ~13 hJanFebruary: ~3 hFebMarch: ~17 hMarApril: ~8 hAprMay: ~10 hMayJune: ~16 hJunJuly: ~4 hJulAugust: ~5 hAugSeptember: ~8 hSepOctober: ~10 hOctNovember: ~24 hNovDecember: ~20 hDec
Fog season is January, March, April, May, June, September, October, November, December, peaking in November; fog is mostly a 2 AM–9 AM phenomenon; typically thinning out by noon; a typical event lasts about 2 hours once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.