Fog in Louisville, KY

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. dense fog (visibility under a mile) is rare here in August.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Louisville Muhammad Ali International Airport (KSDF). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring stations

stationairportfog hours/yrforecast
KSDFLouisville Muhammad Ali International Airport11 h/yrverifying
KLOUBowman Field23 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 Louisville fogs in

Fog here concentrates in February and March — about 11 hours in a typical year at KSDF, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KSDF station page.

Fog season

January: ~1 hJanFebruary: ~4 hFebMarch: ~1 hMarApril: ~0 hAprMay: ~1 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~0 hAugSeptember: ~1 hSepOctober: ~0 hOctNovember: ~1 hNovDecember: ~1 hDec
Fog season is February, peaking in February; fog is mostly a 1 AM–8 AM phenomenon; typically thinning out by 9 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.