Fog in Burlington, IA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 4 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Southeast Iowa Regional Airport (KBRL). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KBRLSoutheast Iowa Regional Airport49 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 Burlington fogs in

Fog here concentrates in January and December — about 49 hours in a typical year at KBRL, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KBRL station page.

Fog season

January: ~12 hJanFebruary: ~5 hFebMarch: ~2 hMarApril: ~1 hAprMay: ~2 hMayJune: ~2 hJunJuly: ~3 hJulAugust: ~4 hAugSeptember: ~2 hSepOctober: ~2 hOctNovember: ~4 hNovDecember: ~11 hDec
Fog season is January, February, July, August, November, December, peaking in January; fog is mostly a 3 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.