Fog in Moosonee, ON

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 6 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

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

Measuring station

stationairportfog hours/yrforecast
CYMOMoosonee Airport55 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 Moosonee fogs in

Fog here concentrates in July and September — about 55 hours in a typical year at CYMO, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the CYMO station page.

Fog season

January: ~0 hJanFebruary: ~3 hFebMarch: ~3 hMarApril: ~6 hAprMay: ~2 hMayJune: ~4 hJunJuly: ~13 hJulAugust: ~6 hAugSeptember: ~9 hSepOctober: ~2 hOctNovember: ~2 hNovDecember: ~4 hDec
Fog season is April, June, July, August, September, December, peaking in July; fog is mostly a 4 AM–8 AM phenomenon; typically thinning out by 10 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.