Fog in Joensuu

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 7 hours of dense fog here (10-year average).

Measured at Joensuu Airport (EFJO). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EFJOJoensuu Airport191 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 Joensuu fogs in

Fog here concentrates in November and December — about 191 hours in a typical year at EFJO, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EFJO station page.

Fog season

January: ~24 hJanFebruary: ~15 hFebMarch: ~16 hMarApril: ~11 hAprMay: ~4 hMayJune: ~2 hJunJuly: ~3 hJulAugust: ~7 hAugSeptember: ~22 hSepOctober: ~25 hOctNovember: ~39 hNovDecember: ~28 hDec
Fog season runs September through April, 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.