Fog in Norwood, MA

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 13 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Norwood Memorial Airport (KOWD). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KOWDNorwood Memorial Airport92 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 Norwood fogs in

Fog here concentrates in September and October — about 92 hours in a typical year at KOWD, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KOWD station page.

Fog season

January: ~4 hJanFebruary: ~5 hFebMarch: ~5 hMarApril: ~4 hAprMay: ~4 hMayJune: ~8 hJunJuly: ~9 hJulAugust: ~13 hAugSeptember: ~15 hSepOctober: ~15 hOctNovember: ~4 hNovDecember: ~7 hDec
Fog season is year-round, peaking in September; fog is mostly a midnight–5 AM phenomenon; typically thinning out by 7 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.