Fog in Rovaniemi

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 20 hours of dense fog here (10-year average).

Measured at Rovaniemi Airport (EFRO). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EFRORovaniemi Airport519 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 Rovaniemi fogs in

Fog here concentrates in November and October — about 519 hours in a typical year at EFRO, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EFRO station page.

Fog season

January: ~56 hJanFebruary: ~39 hFebMarch: ~42 hMarApril: ~19 hAprMay: ~16 hMayJune: ~5 hJunJuly: ~8 hJulAugust: ~20 hAugSeptember: ~51 hSepOctober: ~89 hOctNovember: ~110 hNovDecember: ~76 hDec
Fog season runs September through March, peaking in November; fog here can hit at any hour of the day; 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.