Fog in Rockland, ME

daily fog outlook & 2016–2026 climatology
No fog signal in NWS guidance for the next 48 hours. August typically brings about 28 hours of dense fog here.forecast cycle 2026-08-16T00:00:00Z · page rebuilt daily · live layers below update hourly

Measured at Knox County Regional Airport (KRKD). This station is in forecast verification — percentages publish when it clears the accuracy bar.

Measuring station

stationairportfog hours/yrforecast
KRKDKnox County Regional Airport207 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 Rockland fogs in

Fog here concentrates in July and June — about 207 hours in a typical year at KRKD, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the KRKD station page.

Fog season

January: ~3 hJanFebruary: ~8 hFebMarch: ~12 hMarApril: ~13 hAprMay: ~20 hMayJune: ~29 hJunJuly: ~40 hJulAugust: ~28 hAugSeptember: ~28 hSepOctober: ~13 hOctNovember: ~3 hNovDecember: ~5 hDec
Fog season runs March through October, peaking in July; fog is mostly a 11 PM–7 AM phenomenon; typically thinning out by 9 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.