Fog in Bedford, MA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 2 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Laurence G Hanscom Field (KBED). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KBEDLaurence G Hanscom Field49 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 Bedford fogs in

Fog here concentrates in December and October — about 49 hours in a typical year at KBED, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KBED station page.

Fog season

January: ~4 hJanFebruary: ~5 hFebMarch: ~5 hMarApril: ~3 hAprMay: ~2 hMayJune: ~3 hJunJuly: ~2 hJulAugust: ~2 hAugSeptember: ~5 hSepOctober: ~7 hOctNovember: ~2 hNovDecember: ~9 hDec
Fog season is January, February, March, April, June, September, October, December, peaking in December; fog is mostly a 1 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.