Fog in Lawrence, 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 Lawrence Municipal Airport (KLWM). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KLWMLawrence Municipal Airport45 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 Lawrence fogs in

Fog here concentrates in December and October — about 45 hours in a typical year at KLWM, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KLWM station page.

Fog season

January: ~5 hJanFebruary: ~6 hFebMarch: ~6 hMarApril: ~1 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~1 hJulAugust: ~2 hAugSeptember: ~4 hSepOctober: ~7 hOctNovember: ~3 hNovDecember: ~8 hDec
Fog season runs August through March, peaking in December; fog is mostly a 1 AM–8 AM phenomenon; typically thinning out by 11 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.