Fog in Oulu / Oulunsalo

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 3 hours of dense fog here (10-year average).

Measured at Oulu Airport (EFOU). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EFOUOulu Airport97 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 Oulu / Oulunsalo fogs in

Fog here concentrates in November and October — about 97 hours in a typical year at EFOU, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EFOU station page.

Fog season

January: ~13 hJanFebruary: ~11 hFebMarch: ~7 hMarApril: ~4 hAprMay: ~4 hMayJune: ~1 hJunJuly: ~2 hJulAugust: ~3 hAugSeptember: ~13 hSepOctober: ~14 hOctNovember: ~18 hNovDecember: ~8 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 1 hour once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.