CZMT — Masset Airport

fog forecast & climatology · Masset city page · full 10-year analysis →
Fog possible — NWS guidance shows a fog signal in the next 48 hours. September typically brings about 2 hours of dense fog here.forecast cycle 2026-09-04T13:00:00Z · page rebuilt daily · live layers below update hourly

Fog hours per year
26 h below CAT I minima (2016–2026 average)
Fog season
July and September
Typical fog event
~1 h once it forms (middle half 1–2 h, n=72)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Masset Airport spends 26 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in July and September. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~2 hJanFebruary: ~0 hFebMarch: ~0 hMarApril: ~0 hAprMay: ~2 hMayJune: ~1 hJunJuly: ~3 hJulAugust: ~2 hAugSeptember: ~2 hSepOctober: ~1 hOctNovember: ~1 hNovDecember: ~1 hDec
Fog season is January, May, July, August, September, peaking in July; fog is mostly a 6 AM–9 AM phenomenon; typically thinning out by 11 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.