Fog in Milwaukee, WI

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 1 hour of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at General Mitchell International Airport (KMKE). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KMKEGeneral Mitchell International Airport61 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 Milwaukee fogs in

Fog here concentrates in January and March — about 61 hours in a typical year at KMKE, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KMKE station page.

Fog season

January: ~11 hJanFebruary: ~5 hFebMarch: ~11 hMarApril: ~5 hAprMay: ~10 hMayJune: ~4 hJunJuly: ~0 hJulAugust: ~1 hAugSeptember: ~4 hSepOctober: ~2 hOctNovember: ~0 hNovDecember: ~8 hDec
Fog season is January, February, March, April, May, June, September, December, peaking in January; fog here can hit at any hour of the day; 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.