Fog in Bratsk

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 14 hours of dense fog here (10-year average).

Measured at Bratsk Airport (UIBB). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
UIBBBratsk Airport110 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 Bratsk fogs in

Fog here concentrates in February and December — about 110 hours in a typical year at UIBB, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the UIBB station page.

Fog season

January: ~15 hJanFebruary: ~17 hFebMarch: ~7 hMarApril: ~5 hAprMay: ~3 hMayJune: ~3 hJunJuly: ~8 hJulAugust: ~14 hAugSeptember: ~13 hSepOctober: ~5 hOctNovember: ~7 hNovDecember: ~15 hDec
Fog season runs July through April, peaking in February; fog is mostly a 3 AM–10 AM phenomenon; typically thinning out by noon; 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.