Fog in Seinäjoki / Ilmajoki

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 31 hours of dense fog here (10-year average).

Measured at Seinäjoki Airport (EFSI). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EFSISeinäjoki Airport250 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 Seinäjoki / Ilmajoki fogs in

Fog here concentrates in September and October — about 250 hours in a typical year at EFSI, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EFSI station page.

Fog season

January: ~26 hJanFebruary: ~19 hFebMarch: ~14 hMarApril: ~11 hAprMay: ~10 hMayJune: ~9 hJunJuly: ~17 hJulAugust: ~31 hAugSeptember: ~36 hSepOctober: ~31 hOctNovember: ~30 hNovDecember: ~21 hDec
Fog season is year-round, peaking in September; fog is mostly a 11 PM–8 AM phenomenon; typically thinning out by 11 AM; 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.