Fog in Dubuque, IA

daily fog outlook & 2016–2026 climatology
Some chance of fog — peaks at 48% around 6 am Sunday.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Dubuque Regional Airport (KDBQ). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KDBQDubuque Regional Airport105 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 Dubuque fogs in

Fog here concentrates in January and December — about 105 hours in a typical year at KDBQ, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KDBQ station page.

Fog season

January: ~26 hJanFebruary: ~14 hFebMarch: ~10 hMarApril: ~2 hAprMay: ~2 hMayJune: ~4 hJunJuly: ~3 hJulAugust: ~7 hAugSeptember: ~5 hSepOctober: ~3 hOctNovember: ~8 hNovDecember: ~21 hDec
Fog season is January, February, March, August, November, December, peaking in January; fog is mostly a midnight–9 AM phenomenon; typically thinning out by 1 PM; 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.