Fog in Boos

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 Rouen Vallée de Seine Airport (LFOP). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
LFOPRouen Vallée de Seine Airport186 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 Boos fogs in

Fog here concentrates in December and January — about 186 hours in a typical year at LFOP, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the LFOP station page.

Fog season

January: ~43 hJanFebruary: ~17 hFebMarch: ~8 hMarApril: ~3 hAprMay: ~5 hMayJune: ~6 hJunJuly: ~2 hJulAugust: ~2 hAugSeptember: ~6 hSepOctober: ~15 hOctNovember: ~28 hNovDecember: ~55 hDec
Fog season runs October through February, peaking in December; fog is mostly a 2 AM–noon phenomenon; typically thinning out by 4 PM; 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.