Fog in Grafton, NSW

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 23 hours of dense fog here (10-year average).

Measured at Clarence Valley Regional Airport (YGFN). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
YGFNClarence Valley Regional Airport228 h/yrclimatology

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 Grafton fogs in

Fog here concentrates in July and May — about 228 hours in a typical year at YGFN, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the YGFN station page.

Fog season

January: ~8 hJanFebruary: ~7 hFebMarch: ~18 hMarApril: ~15 hAprMay: ~35 hMayJune: ~28 hJunJuly: ~39 hJulAugust: ~23 hAugSeptember: ~18 hSepOctober: ~20 hOctNovember: ~11 hNovDecember: ~10 hDec
Fog season runs March through December, peaking in July; fog is mostly a 2 AM–8 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.