RORS — Shimojishima Airport

fog forecast & climatology · Miyakojima city page · full 10-year analysis →
No fog forecast feed exists for this station. dense fog (visibility under a mile) is rare here in September (10-year average).

Fog hours per year
4 h below CAT I minima (2016–2026 average)
Fog season
August and April
Typical fog event
~1 h once it forms (middle half 1–1 h, n=26)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Shimojishima Airport spends 4 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in August and April. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~0 hJanFebruary: ~0 hFebMarch: ~1 hMarApril: ~1 hAprMay: ~1 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~0 hSepOctober: ~1 hOctNovember: ~0 hNovDecember: ~0 hDec
Fog season is August, peaking in August; fog is mostly a 3 AM–3 AM phenomenon; typically thinning out by 4 AM; a typical event lasts about 1 hour once it forms local time · 10-yr average

For flight operations

EFVS crews: the CHASE board ranks airports by live fog status, approach lighting, go-around height and flight time from your base. Forecast probabilities publish here per-airport once the calibrated model beats climatology on live verification — receipts on the scorecard. Methodology.

Sources: NOAA/NWS National Blend of Models guidance · METAR observations 2016–2026 (Iowa Environmental Mesonet) · FAA NASR. Machine access: data.json · llms.txt. Not for operational use.