LESU — Pirineus - la Seu d'Urgel Airport

fog forecast & climatology · La Seu d'Urgell Pyrenees and Andorra city page · full 10-year analysis →
No fog forecast feed exists for this station. September typically brings about 11 hours of dense fog here (10-year average).

Fog hours per year
345 h below CAT I minima (2016–2026 average)
Fog season
December and October
Typical fog event
~1 h once it forms (middle half 1–1 h, n=55)
Data through
2026-08-15 · machine-readable data.json

When this airport fogs in

In a typical year Pirineus - la Seu d'Urgel Airport spends 345 hours below CAT I approach minima (visibility under ~½ mile or ceiling under 200 ft), concentrated in December and October. The strip above shows the hour-by-hour pattern for the current month from ten years of weather observations.

Fog season

January: ~49 hJanFebruary: ~45 hFebMarch: ~2 hMarApril: ~0 hAprMay: ~0 hMayJune: ~0 hJunJuly: ~0 hJulAugust: ~2 hAugSeptember: ~11 hSepOctober: ~52 hOctNovember: ~16 hNovDecember: ~56 hDec
Fog season runs October through February, peaking in December; fog is mostly a 7 AM–7 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.