Fog in Sapporo

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 8 hours of dense fog here (10-year average).

Measured at New Chitose Airport (RJCC). This station has climatology and live observations only.

Measuring stations

stationairportfog hours/yrforecast
RJCCNew Chitose Airport126 h/yrclimatology
RJCOSapporo Okadama Airport73 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 Sapporo fogs in

Fog here concentrates in July and February — about 126 hours in a typical year at RJCC, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the RJCC station page.

Fog season

January: ~11 hJanFebruary: ~14 hFebMarch: ~11 hMarApril: ~10 hAprMay: ~15 hMayJune: ~14 hJunJuly: ~22 hJulAugust: ~8 hAugSeptember: ~5 hSepOctober: ~4 hOctNovember: ~4 hNovDecember: ~8 hDec
Fog season runs December through August, peaking in July; fog is mostly a 11 PM–7 AM phenomenon; typically thinning out by 9 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.