Fog in Varkaus / Joroinen

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. dense fog (visibility under a mile) is rare here in August (10-year average).

Measured at Varkaus Airport (EFVR). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EFVRVarkaus Airport231 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 Varkaus / Joroinen fogs in

Fog here concentrates in March and January — about 231 hours in a typical year at EFVR. Hour-by-hour patterns, live conditions and the forecast strip live on the EFVR station page.

Fog season

January: ~13 hJanFebruary: ~6 hFebMarch: ~43 hMarApril: ~6 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~0 hSepOctober: ~0 hOctNovember: ~0 hNovDecember: ~0 hDec
Fog season is January, March, peaking in March; fog is mostly a midnight–8 AM phenomenon; typically thinning out by 9 AM local time · 10-yr average

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