Fog in Muscle Shoals, AL

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 Northwest Alabama Regional Airport (KMSL). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KMSLNorthwest Alabama Regional Airport27 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 Muscle Shoals fogs in

Fog here concentrates in November and December — about 27 hours in a typical year at KMSL, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KMSL station page.

Fog season

January: ~3 hJanFebruary: ~2 hFebMarch: ~2 hMarApril: ~1 hAprMay: ~3 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~3 hSepOctober: ~2 hOctNovember: ~5 hNovDecember: ~4 hDec
Fog season is January, February, March, May, September, October, November, December, peaking in November; fog is mostly a 4 AM–7 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.