Fog in St. Petersburg

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 6 hours of dense fog here (10-year average).

Measured at Pulkovo Airport (ULLI). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ULLIPulkovo Airport75 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 St. Petersburg fogs in

Fog here concentrates in September and October — about 75 hours in a typical year at ULLI, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ULLI station page.

Fog season

January: ~8 hJanFebruary: ~7 hFebMarch: ~6 hMarApril: ~5 hAprMay: ~3 hMayJune: ~1 hJunJuly: ~3 hJulAugust: ~6 hAugSeptember: ~13 hSepOctober: ~10 hOctNovember: ~8 hNovDecember: ~7 hDec
Fog season runs August through April, peaking in September; fog is mostly a 2 AM–9 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.