LEST — Santiago-Rosalía de Castro Airport

fog forecast & climatology · Santiago de Compostela city page · full 10-year analysis →
No fog forecast feed exists for this station. September typically brings about 24 hours of dense fog here (10-year average).

Fog hours per year
197 h below CAT I minima (2016–2026 average)
Fog season
December and September
Typical fog event
~1 h once it forms (middle half 1–3 h, n=931)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Santiago-Rosalía de Castro Airport spends 197 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in December and September. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~23 hJanFebruary: ~13 hFebMarch: ~11 hMarApril: ~12 hAprMay: ~13 hMayJune: ~13 hJunJuly: ~14 hJulAugust: ~18 hAugSeptember: ~24 hSepOctober: ~18 hOctNovember: ~16 hNovDecember: ~25 hDec
Fog season is year-round, peaking in December; fog is mostly a 3 AM–10 AM phenomenon; typically thinning out by noon; 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.