CYMJ — Moose Jaw Air Vice Marshal C. M. McEwen Airport

fog forecast & climatology · Moose Jaw city page · full 10-year analysis →
Fog possible — NWS guidance shows a fog signal in the next 48 hours. September typically brings about 1 hour of dense fog here.forecast cycle 2026-09-04T13:00:00Z · page rebuilt daily · live layers below update hourly

Fog hours per year
55 h below CAT I minima (2016–2026 average)
Fog season
March and November
Typical fog event
~1 h once it forms (middle half 1–3 h, n=101)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Moose Jaw Air Vice Marshal C. M. McEwen Airport spends 55 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in March and November. 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: ~5 hMarApril: ~5 hAprMay: ~2 hMayJune: ~0 hJunJuly: ~5 hJulAugust: ~2 hAugSeptember: ~1 hSepOctober: ~1 hOctNovember: ~5 hNovDecember: ~2 hDec
Fog season is January, February, March, April, May, July, August, November, December, peaking in March; fog is mostly a 4 AM–10 AM phenomenon; typically thinning out by 1 PM; 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.