Fog in Hakodate

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 1 hour of dense fog here (10-year average).

Measured at Hakodate Airport (RJCH). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
RJCHHakodate 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 Hakodate fogs in

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

Fog season

January: ~10 hJanFebruary: ~7 hFebMarch: ~3 hMarApril: ~3 hAprMay: ~7 hMayJune: ~20 hJunJuly: ~18 hJulAugust: ~1 hAugSeptember: ~0 hSepOctober: ~0 hOctNovember: ~2 hNovDecember: ~8 hDec
Fog season is January, February, May, June, July, December, 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.