CZST — Stewart Airport

fog forecast & climatology · Stewart city page · full 10-year analysis →
No fog signal in NWS guidance for the next 48 hours. September typically brings about 4 hours of dense fog here.forecast cycle 2026-09-04T13:00:00Z · page rebuilt daily · live layers below update hourly

Fog hours per year
62 h below CAT I minima (2016–2026 average)
Fog season
October and December
Typical fog event
~1 h once it forms (middle half 1–2 h, n=195)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Stewart Airport spends 62 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in October and December. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~4 hJanFebruary: ~2 hFebMarch: ~2 hMarApril: ~0 hAprMay: ~1 hMayJune: ~0 hJunJuly: ~2 hJulAugust: ~4 hAugSeptember: ~4 hSepOctober: ~5 hOctNovember: ~2 hNovDecember: ~5 hDec
Fog season runs July through March, peaking in October; 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.