Fog in Tromsø

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 Tromsø Airport (ENTC). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ENTCTromsø Airport38 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 Tromsø fogs in

Fog here concentrates in September and August — about 38 hours in a typical year at ENTC, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ENTC station page.

Fog season

January: ~4 hJanFebruary: ~3 hFebMarch: ~5 hMarApril: ~2 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~2 hJulAugust: ~6 hAugSeptember: ~7 hSepOctober: ~3 hOctNovember: ~2 hNovDecember: ~4 hDec
Fog season runs July through April, peaking in September; fog is mostly a 1 AM–7 AM phenomenon; typically thinning out by 1 PM; a typical event lasts about 1 hour once it forms local time · 10-yr average

Machine access: data.json · llms.txt · forecast verification. Not for operational use.