Fog in Matsumoto

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. dense fog (visibility under a mile) is rare here in August (10-year average).

Measured at Shinshu-Matsumoto Airport (RJAF). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
RJAFShinshu-Matsumoto Airport18 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 Matsumoto fogs in

Fog here concentrates in March and February — about 18 hours in a typical year at RJAF, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the RJAF station page.

Fog season

January: ~1 hJanFebruary: ~2 hFebMarch: ~3 hMarApril: ~0 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~0 hSepOctober: ~0 hOctNovember: ~2 hNovDecember: ~1 hDec
Fog season is February, March, November, peaking in March; fog is mostly a 8 AM–8 AM phenomenon; typically thinning out by 11 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.