Fog in Matsudo

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 JMSDF Shimofusa Air Base (RJTL). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
RJTLJMSDF Shimofusa Air Base91 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 Matsudo fogs in

Fog here concentrates in November and February — about 91 hours in a typical year at RJTL, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the RJTL station page.

Fog season

January: ~0 hJanFebruary: ~23 hFebMarch: ~8 hMarApril: ~8 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~6 hJulAugust: ~0 hAugSeptember: ~3 hSepOctober: ~8 hOctNovember: ~27 hNovDecember: ~5 hDec
Fog season is February, March, April, October, November, peaking in November; fog is mostly a 2 AM–2 AM phenomenon; typically thinning out by 3 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.