Fog in Thompson, MB

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 4%). 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 Thompson Airport (CYTH). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
CYTHThompson Airport25 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 Thompson fogs in

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

Fog season

January: ~1 hJanFebruary: ~0 hFebMarch: ~2 hMarApril: ~0 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~2 hJulAugust: ~2 hAugSeptember: ~6 hSepOctober: ~5 hOctNovember: ~3 hNovDecember: ~0 hDec
Fog season is March, July, August, September, October, November, peaking in September; fog is mostly a 5 AM–10 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.