Fog in Oslo

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

Measured at Moss Airport; Rygge (ENRY). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ENRYMoss Airport; Rygge389 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 Oslo fogs in

Fog here concentrates in February and December — about 389 hours in a typical year at ENRY, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ENRY station page.

Fog season

January: ~53 hJanFebruary: ~63 hFebMarch: ~60 hMarApril: ~20 hAprMay: ~14 hMayJune: ~7 hJunJuly: ~8 hJulAugust: ~10 hAugSeptember: ~26 hSepOctober: ~30 hOctNovember: ~34 hNovDecember: ~67 hDec
Fog season runs September through April, peaking in December; fog is mostly a 8 PM–9 AM phenomenon; 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.