Fog in Mosinee, WI

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 15%). August typically brings about 12 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Central Wisconsin Airport (KCWA). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KCWACentral Wisconsin Airport121 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 Mosinee fogs in

Fog here concentrates in December and January — about 121 hours in a typical year at KCWA, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KCWA station page.

Fog season

January: ~19 hJanFebruary: ~6 hFebMarch: ~10 hMarApril: ~5 hAprMay: ~6 hMayJune: ~5 hJunJuly: ~6 hJulAugust: ~12 hAugSeptember: ~8 hSepOctober: ~3 hOctNovember: ~8 hNovDecember: ~31 hDec
Fog season is January, March, August, September, November, December, peaking in December; fog is mostly a 2 AM–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.