Fog in Breslau, ON

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 11%). August typically brings about 9 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Region of Waterloo International Airport (CYKF). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYKFRegion of Waterloo International Airport122 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 Breslau fogs in

Fog here concentrates in September and October — about 122 hours in a typical year at CYKF, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYKF station page.

Fog season

January: ~11 hJanFebruary: ~9 hFebMarch: ~9 hMarApril: ~4 hAprMay: ~7 hMayJune: ~3 hJunJuly: ~7 hJulAugust: ~9 hAugSeptember: ~22 hSepOctober: ~16 hOctNovember: ~14 hNovDecember: ~16 hDec
Fog season is January, February, March, May, July, August, September, October, November, December, peaking in September; fog is mostly a 1 AM–8 AM phenomenon; typically thinning out by 10 AM; 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.