VVVD — Van Don International Airport

fog forecast & climatology · Van Don city page · full 10-year analysis →
No fog forecast feed exists for this station. September typically brings about 4 hours of dense fog here (10-year average).

Fog hours per year
35 h below CAT I minima (2016–2026 average)
Fog season
February and March
Typical fog event
~1 h once it forms (middle half 1–1 h, n=85)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Van Don International Airport spends 35 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in February and March. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~2 hJanFebruary: ~8 hFebMarch: ~5 hMarApril: ~1 hAprMay: ~2 hMayJune: ~4 hJunJuly: ~3 hJulAugust: ~3 hAugSeptember: ~4 hSepOctober: ~0 hOctNovember: ~1 hNovDecember: ~0 hDec
Fog season is January, February, March, May, June, July, August, September, peaking in February; fog is mostly a 1 AM–4 AM phenomenon; typically thinning out by 8 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.