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Milan has a continental climate that makes it one of the more challenging Italian cities for air quality. The Po Valley — Europe's most polluted plain — traps fine particulate matter in calm winter conditions. Between October and February, PM2.5 regularly exceeds WHO guidelines, and Lombardy issues traffic restriction orders during pollution peaks.
Summer ventilation in Milan follows Rome's pattern but with more humidity. The urban heat island effect is significant — urban neighbourhoods can be 5–7°C hotter than surrounding countryside. Summer thunderstorms dramatically clear the air: the 24–48 hours following a storm are typically Milan's best ventilation windows of the season.
The safest approach in autumn and winter is early-morning ventilation, before traffic builds pollution to daily peaks. OpenWindow.live's real-time AQI monitoring is particularly valuable in Milan given the year-round pollution variability driven by the Po Valley geography.
À Milano, les meilleurs moments pour aérer sont généralement tôt le matin (5–8h) et le soir tard, quand la température extérieure passe sous celle de l'intérieur.
Oui, dans la plupart des cas. Ouvrir les fenêtres peut faire baisser la température intérieure de 2–5°C en 30 minutes si l'air extérieur est plus frais.
Au-dessus de 80%, ouvrir les fenêtres rend l'air collant. Mieux vaut attendre des heures plus sèches.