CYHU — Montréal / Saint-Hubert Metropolitan Airport

fog forecast & climatology · Montréal city page · full 10-year analysis →
Fog unlikely through Saturday (peak 2%). 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
34 h below CAT I minima (2016–2026 average)
Fog season
November and March
Typical fog event
~1 h once it forms (middle half 1–2 h, n=166)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Montréal / Saint-Hubert Metropolitan Airport spends 34 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in November and March. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~3 hJanFebruary: ~4 hFebMarch: ~5 hMarApril: ~2 hAprMay: ~1 hMayJune: ~0 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~2 hSepOctober: ~4 hOctNovember: ~5 hNovDecember: ~5 hDec
Fog season runs August through April, peaking in March; fog is mostly a 3 AM–10 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.