Fog in Trondheim

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 Trondheim Airport; Værnes (ENVA). This station has climatology and live observations only.

Measuring station

stationairportfog hours/yrforecast
ENVATrondheim Airport; Værnes27 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 Trondheim fogs in

Fog here concentrates in November and September — about 27 hours in a typical year at ENVA, usually lasting ~1 h once it forms. Hour-by-hour patterns, live conditions and the forecast strip live on the ENVA station page.

Fog season

January: ~4 hJanFebruary: ~3 hFebMarch: ~2 hMarApril: ~0 hAprMay: ~1 hMayJune: ~1 hJunJuly: ~0 hJulAugust: ~2 hAugSeptember: ~4 hSepOctober: ~1 hOctNovember: ~5 hNovDecember: ~4 hDec
Fog season is January, February, March, August, September, November, December, peaking in November; fog is mostly a midnight–8 AM phenomenon; 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.