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Sevilla 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 Sevilla'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.
Em Sevilla, os melhores momentos para ventilar são geralmente de manhã cedo (5–8h) e ao final da noite, quando a temperatura exterior desce abaixo da interior.
Sim, na maioria dos casos. Abrir as janelas pode baixar a temperatura interior em 2–5°C em 30 minutos se o ar exterior estiver mais fresco.
Acima de 80%, abrir as janelas torna o ar pegajoso. Melhor esperar por horas mais secas.