Fog in Norrköping

daily fog outlook & 2016–2026 climatology
No fog forecast feed exists for this station. August typically brings about 21 hours of dense fog here (10-year average).

Measured at Norrköping Airport (ESSP). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ESSPNorrköping Airport208 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 Norrköping fogs in

Fog here concentrates in September and October — about 208 hours in a typical year at ESSP, usually lasting ~2 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ESSP station page.

Fog season

January: ~20 hJanFebruary: ~13 hFebMarch: ~20 hMarApril: ~8 hAprMay: ~7 hMayJune: ~9 hJunJuly: ~13 hJulAugust: ~21 hAugSeptember: ~34 hSepOctober: ~25 hOctNovember: ~23 hNovDecember: ~17 hDec
Fog season runs June through March, peaking in September; fog is mostly a midnight–6 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.