Fog in Seoul

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 3 hours of dense fog here (10-year average).

Measured at Incheon International Airport (RKSI). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
RKSIIncheon International Airport106 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 Seoul fogs in

Fog here concentrates in March and June — about 106 hours in a typical year at RKSI, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the RKSI station page.

Fog season

January: ~5 hJanFebruary: ~10 hFebMarch: ~22 hMarApril: ~13 hAprMay: ~9 hMayJune: ~19 hJunJuly: ~11 hJulAugust: ~3 hAugSeptember: ~2 hSepOctober: ~1 hOctNovember: ~3 hNovDecember: ~4 hDec
Fog season runs February through July, peaking in March; fog is mostly a 1 AM–8 AM phenomenon; typically thinning out by 10 AM; a typical event lasts about 2 hours once it forms local time · 10-yr average

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