Fog in Petrozavodsk

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 4 hours of dense fog here (10-year average).

Measured at Petrozavodsk Airport (ULPB). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ULPBPetrozavodsk Airport61 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 Petrozavodsk fogs in

Fog here concentrates in October and September — about 61 hours in a typical year at ULPB, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ULPB station page.

Fog season

January: ~6 hJanFebruary: ~2 hFebMarch: ~2 hMarApril: ~2 hAprMay: ~4 hMayJune: ~1 hJunJuly: ~2 hJulAugust: ~4 hAugSeptember: ~14 hSepOctober: ~15 hOctNovember: ~6 hNovDecember: ~5 hDec
Fog season is January, May, August, September, October, November, December, peaking in October; 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.