Fog in King's Lynn, Norfolk

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 4 hours of dense fog here (10-year average).

Measured at RAF Marham (EGYM). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EGYMRAF Marham194 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 King's Lynn, Norfolk fogs in

Fog here concentrates in December and January — about 194 hours in a typical year at EGYM, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EGYM station page.

Fog season

January: ~34 hJanFebruary: ~10 hFebMarch: ~11 hMarApril: ~10 hAprMay: ~9 hMayJune: ~3 hJunJuly: ~2 hJulAugust: ~4 hAugSeptember: ~15 hSepOctober: ~20 hOctNovember: ~23 hNovDecember: ~57 hDec
Fog season runs September through January, peaking in December; fog is mostly a 9 PM–8 AM phenomenon; typically thinning out by noon; 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.