Fog in Arnhem

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 6 hours of dense fog here (10-year average).

Measured at Deelen Air Base (EHDL). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
EHDLDeelen Air Base277 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 Arnhem fogs in

Fog here concentrates in January and December — about 277 hours in a typical year at EHDL, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the EHDL station page.

Fog season

January: ~63 hJanFebruary: ~18 hFebMarch: ~20 hMarApril: ~9 hAprMay: ~11 hMayJune: ~6 hJunJuly: ~7 hJulAugust: ~6 hAugSeptember: ~19 hSepOctober: ~24 hOctNovember: ~41 hNovDecember: ~61 hDec
Fog season runs September through March, peaking in January; fog is mostly a 11 PM–9 AM phenomenon; typically thinning out by 1 PM; 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.