Live-Entscheidung für Marseille. Alle 30 Minuten aktualisiert.
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Marseille has a Mediterranean climate — hot, dry summers and mild, rainy winters that create opposite ventilation challenges across the year. In July and August, temperatures regularly reach 30–38°C and outdoor air stays warm well after midnight. The effective ventilation window in high summer is narrow: only the early morning hours — roughly 5:30 to 8:30 AM — offer outdoor air cooler than a typical indoor temperature. Opening windows in the afternoon or evening brings in warmer air and accelerates indoor heat accumulation rather than reducing it.
The strategy that genuinely works in a Mediterranean summer is the same one Mediterranean architecture perfected over centuries: seal in the cool night air by closing windows by 9 AM, keep shutters or blinds closed against direct sun during the day, then re-open fully from midnight. This passive cooling cycle can maintain indoor temperatures 4–7°C below peak outdoor levels without air conditioning. Spring and autumn — October through November and March through May — are Marseille's best ventilation seasons, with outdoor temperatures in the 12–22°C range and clean air. OpenWindow.live integrates real-time air quality to flag Saharan dust events or pollen peaks that can temporarily advise against ventilation.
In Marseille sind frühmorgens (5–8 Uhr) und spätabends (nach Sonnenuntergang) meist am besten, wenn die Außentemperatur unter die Innentemperatur fällt.
In den meisten Fällen ja. Lüften kann die Innentemperatur in 30 Minuten um 2–5°C senken, wenn die Außenluft kühler ist.
Über 80% wird die Luft beim Lüften schwül. Besser auf trockenere Stunden warten.