Fog in Prince Rupert, BC

daily fog outlook & 2016–2026 climatology
Fog possible — NWS guidance shows a fog signal in the next 48 hours. August typically brings about 26 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Prince Rupert Airport (CYPR). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
CYPRPrince Rupert Airport101 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 Prince Rupert fogs in

Fog here concentrates in August and September — about 101 hours in a typical year at CYPR, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYPR station page.

Fog season

January: ~4 hJanFebruary: ~1 hFebMarch: ~3 hMarApril: ~4 hAprMay: ~7 hMayJune: ~10 hJunJuly: ~14 hJulAugust: ~26 hAugSeptember: ~17 hSepOctober: ~11 hOctNovember: ~5 hNovDecember: ~0 hDec
Fog season runs May through October, peaking in August; fog is mostly a 3 AM–9 AM phenomenon; typically thinning out by 11 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.