Fog in Yellowknife, NT

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. dense fog (visibility under a mile) is rare here in August.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Yellowknife International Airport (CYZF). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYZFYellowknife International Airport26 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 Yellowknife fogs in

Fog here concentrates in October and September — about 26 hours in a typical year at CYZF, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYZF station page.

Fog season

January: ~1 hJanFebruary: ~1 hFebMarch: ~0 hMarApril: ~1 hAprMay: ~1 hMayJune: ~2 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~4 hSepOctober: ~9 hOctNovember: ~3 hNovDecember: ~3 hDec
Fog season runs September through December, peaking in October; fog is mostly a 6 AM–10 AM phenomenon; typically thinning out by 4 PM; 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.