CYYY — Mont Joli Airport

fog forecast & climatology · Mont-Joli city page · full 10-year analysis →
Some chance of fog — peaks at 34% around 10 am Friday.forecast cycle 2026-09-04T13:00:00Z · page rebuilt daily · live layers below update hourly

Fog hours per year
82 h below CAT I minima (2016–2026 average)
Fog season
June and April
Typical fog event
~1 h once it forms (middle half 1–3 h, n=379)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Mont Joli Airport spends 82 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in June and April. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~9 hJanFebruary: ~7 hFebMarch: ~9 hMarApril: ~10 hAprMay: ~4 hMayJune: ~13 hJunJuly: ~9 hJulAugust: ~5 hAugSeptember: ~7 hSepOctober: ~4 hOctNovember: ~1 hNovDecember: ~3 hDec
Fog season runs January through October, peaking in June; fog here can hit at any hour of the day; a typical event lasts about 1 hour once it forms local time · 10-yr average

Runway infrastructure

endapproach lightsbest approachlengthRVR
06ODALSLPV6,000 ftRVR
24other ALSLPV6,000 ft—
33—LPV3,934 ft—
15—LPV3,934 ft—

From FAA NASR / curated AIP Canada research. Approach-light class and minima tier drive how low an approach can be flown — details in the chase board.

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.