Fog in Narita

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 Narita International Airport (RJAA). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
RJAANarita International Airport58 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 Narita fogs in

Fog here concentrates in June and July — about 58 hours in a typical year at RJAA, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the RJAA station page.

Fog season

January: ~2 hJanFebruary: ~2 hFebMarch: ~5 hMarApril: ~5 hAprMay: ~3 hMayJune: ~8 hJunJuly: ~8 hJulAugust: ~4 hAugSeptember: ~5 hSepOctober: ~6 hOctNovember: ~7 hNovDecember: ~3 hDec
Fog season is year-round, peaking in June; fog is mostly a 2 AM–6 AM phenomenon; typically thinning out by 8 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.