Fog in Worcester, MA

daily fog outlook & 2016–2026 climatology
Fog unlikely through Monday (peak 11%). 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 Worcester Regional Airport (KORH). Forecast percentages for this station have passed live verification.

Measuring station

stationairportfog hours/yrforecast
KORHWorcester Regional Airport291 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 Worcester fogs in

Fog here concentrates in March and January — about 291 hours in a typical year at KORH, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KORH station page.

Fog season

January: ~34 hJanFebruary: ~25 hFebMarch: ~36 hMarApril: ~25 hAprMay: ~27 hMayJune: ~13 hJunJuly: ~18 hJulAugust: ~13 hAugSeptember: ~25 hSepOctober: ~30 hOctNovember: ~16 hNovDecember: ~28 hDec
Fog season is year-round, peaking in March; fog is mostly a 1 AM–10 AM phenomenon; 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.