Fog in Burlington, VT

daily fog outlook & 2016–2026 climatology
Fog unlikely through Sunday (peak 2%). 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 Patrick Leahy Burlington International Airport (KBTV). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KBTVPatrick Leahy Burlington International Airport20 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 Burlington fogs in

Fog here concentrates in March and February — about 20 hours in a typical year at KBTV, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KBTV station page.

Fog season

January: ~2 hJanFebruary: ~2 hFebMarch: ~3 hMarApril: ~1 hAprMay: ~0 hMayJune: ~2 hJunJuly: ~1 hJulAugust: ~1 hAugSeptember: ~2 hSepOctober: ~2 hOctNovember: ~2 hNovDecember: ~2 hDec
Fog season is January, February, March, June, September, October, November, December, peaking in March; fog is mostly a 4 AM–9 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.