Fog in Barre/Montpelier, VT

daily fog outlook & 2016–2026 climatology
Fog likely Sunday — 66% chance of fog (visibility under 1 mile) around 6 am Sunday, with the fog window roughly 3 am to 8 am local time.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Edward F Knapp State Airport (KMPV). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KMPVEdward F Knapp State Airport246 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 Barre/Montpelier fogs in

Fog here concentrates in September and August — about 246 hours in a typical year at KMPV, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KMPV station page.

Fog season

January: ~6 hJanFebruary: ~4 hFebMarch: ~9 hMarApril: ~5 hAprMay: ~10 hMayJune: ~17 hJunJuly: ~35 hJulAugust: ~49 hAugSeptember: ~64 hSepOctober: ~29 hOctNovember: ~10 hNovDecember: ~11 hDec
Fog season runs June through October, peaking in September; fog is mostly a 3 AM–7 AM phenomenon; typically thinning out by 9 AM; a typical event lasts about 2 hours once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.