Fog in Kuopio / Siilinjärvi

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 Kuopio Airport (EFKU). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EFKUKuopio Airport94 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 Kuopio / Siilinjärvi fogs in

Fog here concentrates in September and January — about 94 hours in a typical year at EFKU, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EFKU station page.

Fog season

January: ~13 hJanFebruary: ~8 hFebMarch: ~8 hMarApril: ~7 hAprMay: ~4 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~17 hSepOctober: ~12 hOctNovember: ~10 hNovDecember: ~13 hDec
Fog season runs September through April, peaking in September; fog is mostly a 10 PM–10 AM phenomenon; 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.