Fog in Trenton, ON

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 6%). August typically brings about 3 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at CFB Trenton (CYTR). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYTRCFB Trenton68 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 Trenton fogs in

Fog here concentrates in December and February — about 68 hours in a typical year at CYTR, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYTR station page.

Fog season

January: ~9 hJanFebruary: ~10 hFebMarch: ~6 hMarApril: ~4 hAprMay: ~4 hMayJune: ~2 hJunJuly: ~1 hJulAugust: ~3 hAugSeptember: ~4 hSepOctober: ~5 hOctNovember: ~9 hNovDecember: ~12 hDec
Fog season runs August through May, peaking in December; fog is mostly a 11 PM–8 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.