Fog in Bangor, ME

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for 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 Bangor International Airport (KBGR). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KBGRBangor International Airport88 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 Bangor fogs in

Fog here concentrates in March and September — about 88 hours in a typical year at KBGR, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KBGR station page.

Fog season

January: ~6 hJanFebruary: ~9 hFebMarch: ~13 hMarApril: ~4 hAprMay: ~5 hMayJune: ~8 hJunJuly: ~6 hJulAugust: ~5 hAugSeptember: ~10 hSepOctober: ~9 hOctNovember: ~4 hNovDecember: ~10 hDec
Fog season is year-round, peaking in March; fog is mostly a 3 AM–7 AM phenomenon; typically thinning out by 10 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.