Fog in Moline, IL

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 7%). August typically brings about 3 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Quad City International Airport (KMLI). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KMLIQuad City International Airport29 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 Moline fogs in

Fog here concentrates in January and December — about 29 hours in a typical year at KMLI, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KMLI station page.

Fog season

January: ~8 hJanFebruary: ~2 hFebMarch: ~2 hMarApril: ~1 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~3 hAugSeptember: ~2 hSepOctober: ~1 hOctNovember: ~2 hNovDecember: ~7 hDec
Fog season is January, February, March, August, September, November, December, peaking in January; fog is mostly a 5 AM–7 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.