Fog in Lannion

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 9 hours of dense fog here (10-year average).

Measured at Lannion Airport (LFRO). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
LFROLannion Airport117 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 Lannion fogs in

Fog here concentrates in December and May — about 117 hours in a typical year at LFRO, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the LFRO station page.

Fog season

January: ~7 hJanFebruary: ~4 hFebMarch: ~12 hMarApril: ~8 hAprMay: ~16 hMayJune: ~11 hJunJuly: ~9 hJulAugust: ~9 hAugSeptember: ~10 hSepOctober: ~13 hOctNovember: ~10 hNovDecember: ~18 hDec
Fog season runs March through January, peaking in December; fog is mostly a 1 AM–9 AM phenomenon; typically thinning out by 11 AM; 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.