EFTU — Turku Airport

fog forecast & climatology · Turku city page · full 10-year analysis →
No fog forecast feed exists for this station. September typically brings about 18 hours of dense fog here (10-year average).

Fog hours per year
221 h below CAT I minima (2016–2026 average)
Fog season
January and February
Typical fog event
~1 h once it forms (middle half 1–3 h, n=1058)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Turku Airport spends 221 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in January and February. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~30 hJanFebruary: ~27 hFebMarch: ~29 hMarApril: ~11 hAprMay: ~9 hMayJune: ~4 hJunJuly: ~7 hJulAugust: ~20 hAugSeptember: ~18 hSepOctober: ~19 hOctNovember: ~20 hNovDecember: ~28 hDec
Fog season runs August through May, peaking in January; fog is mostly a midnight–10 AM phenomenon; typically thinning out by 4 PM; a typical event lasts about 1 hour once it forms local time · 10-yr average

For flight operations

EFVS crews: the CHASE board ranks airports by live fog status, approach lighting, go-around height and flight time from your base. Forecast probabilities publish here per-airport once the calibrated model beats climatology on live verification — receipts on the scorecard. Methodology.

Sources: NOAA/NWS National Blend of Models guidance · METAR observations 2016–2026 (Iowa Environmental Mesonet) · FAA NASR. Machine access: data.json · llms.txt. Not for operational use.