Fog in Castlegar, BC

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 1 hour of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Castlegar/West Kootenay Regional Airport (CYCG). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYCGCastlegar/West Kootenay Regional Airport65 h/yrverifying

Fog is measured where instruments live — airports. Hours/yr = time below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), the aviation definition of seriously dense fog.

When Castlegar fogs in

Fog here concentrates in October and May — about 65 hours in a typical year at CYCG, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYCG station page.

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

Machine access: data.json · llms.txt · forecast verification. Not for operational use.