Fog in Hiroshima

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 7 hours of dense fog here (10-year average).

Measured at Hiroshima Airport (RJOA). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
RJOAHiroshima Airport140 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 Hiroshima fogs in

Fog here concentrates in June and May — about 140 hours in a typical year at RJOA, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the RJOA station page.

Fog season

January: ~7 hJanFebruary: ~10 hFebMarch: ~17 hMarApril: ~16 hAprMay: ~23 hMayJune: ~35 hJunJuly: ~23 hJulAugust: ~7 hAugSeptember: ~7 hSepOctober: ~9 hOctNovember: ~5 hNovDecember: ~9 hDec
Fog season is February, March, April, May, June, July, October, December, peaking in June; fog is mostly a 11 PM–7 AM phenomenon; 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.