Fog in Hay River, NT

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. 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 Hay River / Merlyn Carter Airport (CYHY). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYHYHay River / Merlyn Carter Airport25 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 Hay River fogs in

Fog here concentrates in November and October — about 25 hours in a typical year at CYHY, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYHY station page.

Fog season

January: ~2 hJanFebruary: ~1 hFebMarch: ~1 hMarApril: ~1 hAprMay: ~1 hMayJune: ~2 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~1 hSepOctober: ~4 hOctNovember: ~5 hNovDecember: ~3 hDec
Fog season is January, June, August, October, November, December, peaking in November; fog is mostly a 5 AM–noon phenomenon; 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.