CYCG — Castlegar/West Kootenay Regional Airport

fog forecast & climatology · Castlegar 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
65 h below CAT I minima (2016–2026 average)
Fog season
October and May
Typical fog event
~2 h once it forms (middle half 1–3 h, n=200)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Castlegar/West Kootenay Regional Airport spends 65 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in October and May. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~5 hJanFebruary: ~4 hFebMarch: ~3 hMarApril: ~1 hAprMay: ~8 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~4 hSepOctober: ~14 hOctNovember: ~5 hNovDecember: ~2 hDec
Fog season is January, February, May, September, October, November, peaking in October; fog is mostly a 5 AM–9 AM phenomenon; typically thinning out by 10 AM; a typical event lasts about 2 hours 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.