Fog in Williams Lake, BC

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 1%). August typically brings about 2 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Williams Lake Airport (CYWL). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYWLWilliams Lake Airport44 h/yrlive forecast

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 Williams Lake fogs in

Fog here concentrates in December and November — about 44 hours in a typical year at CYWL, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYWL station page.

Fog season

January: ~3 hJanFebruary: ~3 hFebMarch: ~2 hMarApril: ~2 hAprMay: ~0 hMayJune: ~2 hJunJuly: ~3 hJulAugust: ~2 hAugSeptember: ~5 hSepOctober: ~5 hOctNovember: ~7 hNovDecember: ~12 hDec
Fog season is January, February, July, September, October, November, December, peaking in December; fog is mostly a 6 AM–10 AM phenomenon; typically thinning out by noon; a typical event lasts about 1 hour once it forms local time · 10-yr average

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