Fog in Asheville, NC

daily fog outlook & 2016–2026 climatology
Fog possible — NWS guidance shows a fog signal in the next 48 hours. August typically brings about 5 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

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

Measuring station

stationairportfog hours/yrforecast
KAVLAsheville Regional Airport59 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 Asheville fogs in

Fog here concentrates in September and October — about 59 hours in a typical year at KAVL, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KAVL station page.

Fog season

January: ~8 hJanFebruary: ~2 hFebMarch: ~5 hMarApril: ~2 hAprMay: ~5 hMayJune: ~2 hJunJuly: ~3 hJulAugust: ~5 hAugSeptember: ~10 hSepOctober: ~10 hOctNovember: ~4 hNovDecember: ~5 hDec
Fog season is January, March, May, July, August, September, October, November, December, peaking in September; fog is mostly a 4 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.