Fog in Dryden, ON

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 16%). August typically brings about 5 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Dryden Regional Airport (CYHD). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYHDDryden Regional Airport57 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 Dryden fogs in

Fog here concentrates in December and September — about 57 hours in a typical year at CYHD, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYHD station page.

Fog season

January: ~5 hJanFebruary: ~3 hFebMarch: ~3 hMarApril: ~7 hAprMay: ~2 hMayJune: ~1 hJunJuly: ~4 hJulAugust: ~5 hAugSeptember: ~8 hSepOctober: ~4 hOctNovember: ~7 hNovDecember: ~9 hDec
Fog season runs July through April, peaking in December; fog is mostly a 5 AM–9 AM phenomenon; typically thinning out by 1 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.