Fog in Utti / Valkeala

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 12 hours of dense fog here (10-year average).

Measured at Utti Air Base (EFUT). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EFUTUtti Air Base354 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 Utti / Valkeala fogs in

Fog here concentrates in December and January — about 354 hours in a typical year at EFUT, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EFUT station page.

Fog season

January: ~56 hJanFebruary: ~34 hFebMarch: ~41 hMarApril: ~14 hAprMay: ~6 hMayJune: ~5 hJunJuly: ~6 hJulAugust: ~12 hAugSeptember: ~33 hSepOctober: ~38 hOctNovember: ~50 hNovDecember: ~63 hDec
Fog season runs September through March, peaking in December; fog is mostly a 10 PM–10 AM phenomenon; 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.