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Rome has a Mediterranean climate with hot, dry summers and mild, rainy winters. July and August are the challenging months for ventilation, with temperatures regularly reaching 33–37°C and humidity in the Tiber valley creating a sticky urban microclimate. The city's dense stone construction absorbs heat during the day and releases it slowly overnight.
In a Roman summer, the ventilation window is extremely narrow — only from about 5:30 to 8:00 AM, when outdoor air is cooler than indoor. Romans have long practiced oscurare: keeping shutters closed all day, which reduces indoor temperature by 3–5°C without air conditioning. This is not just tradition but effective passive cooling that genuinely works.
Air quality in Rome is moderate (AQI 35–65), with elevated NO₂ near the GRA ring road. Pollen is significant from January (olive) through May (grasses) — relevant for allergy sufferers considering overnight ventilation in spring and early summer.
Em Roma, 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.