Fog in Saint-Nazaire/Montoir

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 2 hours of dense fog here (10-year average).

Measured at Saint-Nazaire-Montoir Airport (LFRZ). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
LFRZSaint-Nazaire-Montoir Airport109 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 Saint-Nazaire/Montoir fogs in

Fog here concentrates in December and October — about 109 hours in a typical year at LFRZ, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the LFRZ station page.

Fog season

January: ~11 hJanFebruary: ~15 hFebMarch: ~7 hMarApril: ~6 hAprMay: ~3 hMayJune: ~2 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~7 hSepOctober: ~19 hOctNovember: ~16 hNovDecember: ~23 hDec
Fog season runs September through April, peaking in December; fog is mostly a midnight–10 AM phenomenon; typically thinning out by noon; 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.