Fog in Den Helder

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 2 hours of dense fog here (10-year average).

Measured at De Kooy Airfield / Den Helder Naval Air Station (EHKD). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EHKDDe Kooy Airfield / Den Helder Naval Air Station202 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 Den Helder fogs in

Fog here concentrates in December and January — about 202 hours in a typical year at EHKD, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EHKD station page.

Fog season

January: ~34 hJanFebruary: ~26 hFebMarch: ~28 hMarApril: ~6 hAprMay: ~10 hMayJune: ~8 hJunJuly: ~2 hJulAugust: ~2 hAugSeptember: ~7 hSepOctober: ~12 hOctNovember: ~17 hNovDecember: ~47 hDec
Fog season runs October through March, peaking in December; fog here can hit at any hour of the day; 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.